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{{Short description|Individual connection to the internet}}
{{About|Internet access, including broadband Internet access|telecommunications signaling methods|Broadband}}
{{redirect|Internet connection|the M.I.A single|Internet Connection}}
{{Internet|expanded=General}}
'''Internet access''' is the ability of individuals and organizations to connect to the [[Internet]] using [[computer terminal]]s, [[computer]]s, and other devices; and to access services such as [[email]] and the [[History of the World Wide Web|World Wide Web]]. Internet access is sold by [[Internet service provider]]s (ISPs) delivering connectivity at a wide range of [[data signaling rate|data transfer rates]] via various networking technologies. Many organizations, including a growing number of municipal entities, also provide cost-free wireless access and landlines.

Availability of Internet access was once limited, but has grown rapidly. In 1995, only {{val|.04}} percent of the world's population had access, with well over half of those living in the United States,<ref>{{Cite book|title=The world transformed : 1945 to the present|last=H.|first=Hunt, Michael|isbn=9780199371020|pages=431|oclc=907585907|date = 2015-06-26}}</ref> and consumer use was through [[dial-up Internet access|dial-up]]. By the first decade of the 21st century, many consumers in developed nations used faster [[broadband]] technology, and by 2014, 41 percent of the world's population had access,<ref>{{Cite book|title=The world transformed : 1945 to the present|last=H.|first=Hunt, Michael|isbn=9780199371020|pages=431–432|oclc=907585907|date = 2015-06-26}}</ref> broadband was almost ubiquitous worldwide, and global average connection speeds exceeded one megabit per second.<ref>{{cite web |title=Akamai Releases Second Quarter 2014 'State of the Internet' Report |url=http://www.akamai.com/html/about/press/releases/2014/press-093014.html |work=Akamai |date=30 September 2014 |access-date=11 October 2014 |url-status=live |archive-url=https://web.archive.org/web/20141020060839/http://www.akamai.com/html/about/press/releases/2014/press-093014.html |archive-date=20 October 2014 }}</ref>

==History==
{{Main|History of the Internet}}

The Internet developed from the [[ARPANET]], which was funded by the [[Federal government of the United States|US government]] to support projects within the government and at universities and research laboratories in the US – but grew over time to include most of the world's large universities and the research arms of many technology companies.<ref>{{cite journal | author=Ben Segal | title=A Short History of Internet Protocols at CERN | year=1995 | url=http://www.cern.ch/ben/TCPHIST.html}}</ref><ref>[[RIPE|Réseaux IP Européens]] (RIPE)</ref><ref>{{cite web | title=Internet History in Asia | work=16th APAN Meetings/Advanced Network Conference in Busan | url=http://www.apan.net/meetings/busan03/cs-history.htm | access-date=25 December 2005 | url-status=live | archive-url=https://web.archive.org/web/20060201035514/http://apan.net/meetings/busan03/cs-history.htm | archive-date=1 February 2006 }}</ref> Use by a wider audience only came in 1995 when restrictions on the use of the Internet to carry commercial traffic were lifted.<ref name=ConneXions-April1996>[http://www.merit.edu/networkresearch/projecthistory/nsfnet/nsfnet_article.php "Retiring the NSFNET Backbone Service: Chronicling the End of an Era"] {{webarchive|url=https://web.archive.org/web/20110719235238/http://www.merit.edu/networkresearch/projecthistory/nsfnet/nsfnet_article.php |date=2011-07-19 }}, Susan R. Harris and Elise Gerich, ''ConneXions'', Vol. 10, No. 4, April 1996</ref>

In the early to mid-1980s, most Internet access was from [[personal computers]] and [[workstations]] directly connected to [[Local Area network|local area networks]] or from [[dial-up Internet access|dial-up connections]] using [[modems]] and analog [[telephone lines]]. LANs typically operated at 10 Mbit/s,<!-- 100 Mbit/s only came in 1995 --> while modem data-rates grew from 1200 bit/s in the early 1980s, to 56 kbit/s by the late 1990s. Initially, dial-up connections were made from [[Computer terminals|terminals]] or computers running [[Terminal emulator|terminal emulation software]] to [[terminal server]]s on LANs. These dial-up connections did not support end-to-end use of the Internet protocols and only provided terminal to host connections. The introduction of [[network access server]]s supporting the [[Serial Line Internet Protocol]] (SLIP) and later the [[point-to-point protocol]] (PPP) extended the Internet protocols and made the full range of Internet services available to dial-up users; although slower, due to the lower data rates available using dial-up.

An important factor in the rapid rise of Internet access speed has been advances in [[MOSFET]] (MOS transistor) technology.<ref name="Jindal">{{cite journal |last1=Jindal |first1=R. P. |title=From millibits to terabits per second and beyond - Over 60 years of innovation |journal=2009 2nd International Workshop on Electron Devices and Semiconductor Technology |date=2009 |pages=1–6 |doi=10.1109/EDST.2009.5166093 |url=https://events.vtools.ieee.org/m/195547|isbn=978-1-4244-3831-0 |s2cid=25112828 }}</ref> The MOSFET, originally invented by [[Mohamed Atalla]] and [[Dawon Kahng]] in 1959,<ref name="computerhistory">{{cite journal|url=https://www.computerhistory.org/siliconengine/metal-oxide-semiconductor-mos-transistor-demonstrated/|title=1960 - Metal Oxide Semiconductor (MOS) Transistor Demonstrated|journal=The Silicon Engine|publisher=[[Computer History Museum]]}}</ref><ref name="Lojek">{{cite book |last1=Lojek |first1=Bo |title=History of Semiconductor Engineering |url=https://archive.org/details/historysemicondu00loje_697 |url-access=limited |date=2007 |publisher=[[Springer Science & Business Media]] |isbn=9783540342588 |pages=[https://archive.org/details/historysemicondu00loje_697/page/n327 321]–3}}</ref><ref name="computerhistory-transistor">{{cite web |title=Who Invented the Transistor? |url=https://www.computerhistory.org/atchm/who-invented-the-transistor/ |website=[[Computer History Museum]] |date=4 December 2013 |access-date=20 July 2019}}</ref> is the building block of the Internet [[telecommunications networks]].<ref name="triumph">{{cite web |title=Triumph of the MOS Transistor |url=https://www.youtube.com/watch?v=q6fBEjf9WPw |website=[[YouTube]] |publisher=[[Computer History Museum]] |access-date=21 July 2019 |date=6 August 2010}}</ref><ref name="Raymer">{{cite book |last1=Raymer |first1=Michael G. |title=The Silicon Web: Physics for the Internet Age |date=2009 |publisher=[[CRC Press]] |isbn=9781439803127 |page=365 |url=https://books.google.com/books?id=PLYChGDqa6EC&pg=PA365}}</ref> The [[laser]], originally demonstrated by [[Charles H. Townes]] and [[Arthur Leonard Schawlow]] in 1960, was adopted for MOS [[light wave]] systems around 1980, which led to exponential growth of [[Internet bandwidth]]. Continuous [[MOSFET scaling]] has since led to online bandwidth doubling every 18 months ([[Edholm's law]], which is related to [[Moore's law]]), with the bandwidths of online [[communication networks]] rising from [[bits per second]] to [[terabit per second|terabits per second]].<ref name="Jindal"/>

Broadband Internet access, often shortened to just broadband, is simply defined as "Internet access that is always on, and faster than the traditional [[Dial-up Internet access|dial-up access]]"<ref>{{cite web |title= What is Broadband? |work= The National Broadband Plan |publisher= US Federal Communications Commission |url= http://www.broadband.gov/about_broadband.html/ |access-date= July 15, 2011 |url-status= live |archive-url= https://web.archive.org/web/20110713053907/http://www.broadband.gov/about_broadband.html |archive-date= July 13, 2011 }}</ref><ref>{{cite web|title=Inquiry Concerning the Deployment of Advanced Telecommunications Capability to All Americans in a Reasonable and Timely Fashion, and Possible Steps to Accelerate Such Deployment Pursuant to Section 706 of the Telecommunications Act of 1996, as Amended by the Broadband Data Improvement Act |publisher=Federal Communications Commission |work=GN Docket No. 10-159, FCC-10-148A1 |date=August 6, 2010 |url=http://transition.fcc.gov/Daily_Releases/Daily_Business/2010/db0806/FCC-10-148A1.pdf |access-date=July 12, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20110721135629/http://transition.fcc.gov/Daily_Releases/Daily_Business/2010/db0806/FCC-10-148A1.pdf |archive-date=July 21, 2011 }}</ref> and so covers a wide range of technologies. The core of these broadband Internet technologies are [[complementary MOS]] (CMOS) [[digital circuits]],<ref>{{cite book |last1=Geerts |first1=Yves |last2=Steyaert |first2=Michiel |last3=Sansen |first3=Willy |chapter=Chapter 8: Single-Loop Multi-Bit Sigma-Delta Modulators |editor-last1=Rodríguez-Vázquez |editor-first1=Angel |editor-last2=Medeiro |editor-first2=Fernando |editor-last3=Janssens |editor-first3=Edmond |title=CMOS Telecom Data Converters |year=2013 |orig-year=1st pub. 2004 |publisher=[[Springer Science & Business Media]] |isbn=978-1-4757-3724-0 |page=277 |chapter-url=https://books.google.com/books?id=SF3hBwAAQBAJ&pg=PA277}}</ref><ref name="Green">{{cite journal |last1=Green |first1=M. M. |title=An overview on wireline communication systems for high-speed broadband communication |journal=Proceedings of Papers 5th European Conference on Circuits and Systems for Communications (ECCSC'10) |date=November 2010 |pages=1–8 |url=https://ieeexplore.ieee.org/document/5733843}}</ref> the speed capabilities of which were extended with innovative design techniques.<ref name="Green"/> Broadband connections are typically made using a computer's built in [[Ethernet]] networking capabilities, or by using a [[Network interface controller|NIC]] [[expansion card]].

Most broadband services provide a continuous "always on" connection; there is no dial-in process required, and it does not interfere with voice use of phone lines.<ref name="howstuffworks" /> Broadband provides improved access to Internet services such as:
* Faster [[world wide web]] browsing
* Faster downloading of documents, photographs, videos, and other large files
* [[Internet telephony|Telephony]], [[Internet radio|radio]], [[Internet television|television]], and [[videoconferencing]]
* [[Virtual private network]]s and remote system administration
* [[Online game|Online gaming]], especially [[massively multiplayer online role-playing game]]s which are interaction-intensive

In the 1990s, the [[National Information Infrastructure Protection Act|National Information Infrastructure]] initiative in the U.S. made broadband Internet access a public policy issue.<ref>{{cite journal |author1= Jeffrey A. Hart |author2= Robert R. Reed |author3=François Bar |title= The building of the Internet: Implications for the future of broadband networks |journal= Telecommunications Policy |volume= 16 |issue= 8 |pages= 666–689 |date= November 1992 |doi= 10.1016/0308-5961(92)90061-S}}</ref> In 2000, most Internet access to homes was provided using dial-up, while many businesses and schools were using broadband connections. In 2000 there were just under 150 million dial-up subscriptions in the 34 OECD countries<ref name=OECD-countries>The 34 OECD countries are: Australia, Austria, Belgium, Canada, Chile, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Israel, Italy, Japan,
Korea, Luxembourg, Mexico, the Netherlands, New Zealand, Norway, Poland, Portugal, the Slovak
Republic, Slovenia, Spain, Sweden, Switzerland, Turkey, the United Kingdom and the United States. [http://www.oecd.org/pages/0,3417,en_36734052_36761800_1_1_1_1_1,00.html OECD members] {{webarchive|url=https://web.archive.org/web/20110408175139/http://www.oecd.org/pages/0,3417,en_36734052_36761800_1_1_1_1_1,00.html |date=2011-04-08 }}, accessed 1 May 2012</ref> and fewer than 20 million broadband subscriptions. By 2005, broadband had grown and dial-up had declined so that the number of subscriptions were roughly equal at 130 million each. In 2010, in the OECD countries, over 90% of the Internet access subscriptions used broadband, broadband had grown to more than 300 million subscriptions, and dial-up subscriptions had declined to fewer than 30 million.<ref name=OCED-June2011>[http://www.oecd.org/dataoecd/24/5/48255770.pdf ''The Future of the Internet Economy: A Statistical Profile''] {{webarchive|url=https://web.archive.org/web/20120616224428/http://www.oecd.org/dataoecd/24/5/48255770.pdf |date=2012-06-16 }}, Organization for Economic Co-Operation and Development (OECD), June 2011</ref>

The broadband technologies in widest use are [[ADSL]] and [[cable Internet]] access. Newer technologies include [[VDSL]] and [[optical fibre]] extended closer to the subscriber in both telephone and cable plants. [[Fibre-optic communication]], while only recently being used in [[fibre to the x|premises and to the curb]] schemes, has played a crucial role in enabling broadband Internet access by making transmission of information at very high data rates over longer distances much more cost-effective than copper wire technology.

In areas not served by ADSL or cable, some community organizations and local governments are installing [[Wi-Fi Protected Access|Wi-Fi]] networks. Wireless, satellite and microwave Internet are often used in rural, undeveloped, or other hard to serve areas where wired Internet is not readily available.

Newer technologies being deployed for fixed (stationary) and mobile broadband access include [[WiMAX]], [[3GPP Long Term Evolution|LTE]], and [[fixed wireless]].

Starting in roughly 2006, [[mobile broadband]] access is increasingly available at the consumer level using "[[3G]]" and "[[4G LTE|4G]]" technologies such as [[High-Speed Packet Access|HSPA]], [[Evolution-Data Optimized|EV-DO]], [[HSPA+]], and [[3GPP Long Term Evolution|LTE]].

==Availability==
[[File:Internet Connectivity Access layer.svg|thumb|Internet Connectivity Access layer]]
In addition to access from home, school, and the workplace Internet access may be available from [[public place]]s such as [[libraries]] and [[Internet cafes]], where computers with Internet connections are available. Some libraries provide stations for physically connecting users' [[laptop]]s to [[local area network]]s (LANs).

Wireless Internet access points are available in public places such as airport halls, in some cases just for brief use while standing. Some access points may also provide coin-operated computers. Various terms are used, such as "public [[Internet kiosk]]", "public access terminal", and "Web [[payphone]]". Many hotels also have public terminals, usually fee based.

Coffee shops, shopping malls, and other venues increasingly offer wireless access to computer networks, referred to as [[Hotspot (Wi-Fi)|hotspots]], for users who bring their own wireless-enabled devices such as a [[laptop]] or [[personal digital assistant|PDA]]. These services may be free to all, free to customers only, or fee-based. A [[Wi-Fi]] hotspot need not be limited to a confined location since multiple ones combined can cover a whole campus or park, or even an entire city can be enabled.

Additionally, [[Mobile broadband]] access allows [[smart phones]] and other digital devices to connect to the Internet from any location from which a [[mobile phone]] call can be made, subject to the capabilities of that mobile network.

===Speed===
{{Main |Data rates | Bit rates |Bandwidth (computing) |Device data rates |List of countries by Internet connection speeds}}
{| class="infobox bordered;" style="font-size:90%"
|+ <small>[[Data rate units]] ([[SI prefix|SI]])</small>
|- style="text-align:left;"
|| '''Unit.'''       
|| &nbsp;
||  '''Symbol'''
||     '''Bits (b)'''
||     '''Bytes (B)'''
|-
| Kilobit/s.  || (10<sup>3</sup>) || kbit/s || 1,000 bit/s    || 125 B/s
|-
| Megabit/s || (10<sup>6</sup>) || Mbit/s || 1,000 kbit/s   || 125 kB/s
|-
| Gigabit/s. || (10<sup>9</sup>) || Gbit/s || 1,000 Mbit/s || 125 MB/s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
|-
| Terabit/s  || (10<sup>12</sup>) || Tbit/s || 1,000 Gbit/s&nbsp;&nbsp; || 125 GB/s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;    
|-
| Petabit/s  || (10<sup>15</sup>) || Pbit/s || 1,000 Tbit/s&nbsp;&nbsp; || 125 TB/s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;            
|-
| colspan="5" | &nbsp;
|- style="text-align:left;"
|| '''Unit.'''         
|| &nbsp;
|| '''Symbol'''    
|| '''Bits (b)'''
||            '''Bytes (B)'''
|-
| Kilobyte/s   || (10<sup>3</sup>) || kB/s || 8,000 bit/s.        || 1,000 B/s
|-
| Megabyte/s || (10<sup>6</sup>) || MB/s || 8,000 kbit/s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; || 1,000 kB/s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
|-
| Gigabyte/s || (10<sup>9</sup>) || GB/s || 8,000 Mbit/s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; || 1,000 MB/s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
|-
| Terabyte/s || (10<sup>12</sup>) || TB/s || 8,000 Gbit/s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; || 1,000 GB/s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;    
|-
| Petabyte/s || (10<sup>15</sup>) || PB/s || 8,000 Tbit/s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; || 1,000 TB/s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;    
|}
The bit rates for dial-up [[modems]] range from as little as 110 bit/s in the late 1950s, to a maximum of from 33 to 64 kbit/s ([[V.90 (recommendation)|V.90]] and [[V.92]]) in the late 1990s. [[Dial-up Internet access|Dial-up connections]] generally require the dedicated use of a telephone line. Data compression can boost the effective bit rate for a dial-up modem connection from 220 ([[V.42bis]]) to 320 ([[V.44]]) kbit/s.<ref>{{cite web|url=http://fndcg0.fnal.gov/Net/modm8-94.txt |title=What You Need to Know about Modems |access-date=2008-03-02 |last=Willdig |first=Karl |author2=Patrik Chen |date=August 1994 |url-status=dead |archive-url=https://web.archive.org/web/20070104124418/http://fndcg0.fnal.gov/Net/modm8-94.txt |archive-date=2007-01-04 }}</ref> However, the effectiveness of data compression is quite variable, depending on the type of data being sent, the condition of the telephone line, and a number of other factors. In reality, the overall data rate rarely exceeds 150 kbit/s.<ref>{{cite web |url=https://www.pricenfees.com/digit-life-archives/modem-compression-v-44-v-42bis |title=Modem compression: V.44 against V.42bis |access-date=2008-03-02 |last=Mitronov |first=Pavel |date=2001-06-29 |publisher=Pricenfees.com |url-status=dead |archive-url=https://web.archive.org/web/20170202062749/https://www.pricenfees.com/digit-life-archives/modem-compression-v-44-v-42bis |archive-date=2017-02-02 }}</ref>

Broadband technologies supply considerably higher bit rates than dial-up, generally without disrupting regular telephone use. Various minimum data rates and maximum latencies have been used in definitions of broadband, ranging from 64&nbsp;kbit/s up to 4.0&nbsp;Mbit/s.<ref name="Birth">{{cite web |url=http://www.itu.int/osg/spu/publications/birthofbroadband/faq.html |title=Birth of Broadband |publisher=ITU |date=September 2003 |access-date=July 12, 2011 |url-status=live |archive-url=https://web.archive.org/web/20110701173257/http://www.itu.int/osg/spu/publications/birthofbroadband/faq.html |archive-date=July 1, 2011 }}</ref> In 1988 the [[ITU-T|CCITT]] standards body defined "broadband service" as requiring transmission channels capable of supporting [[bit rate]]s greater than the [[Primary Rate Interface|primary rate]] which ranged from about 1.5 to 2&nbsp;Mbit/s.<ref>{{cite web |url= http://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-I.113-199706-I!!PDF-E |title= Recommendation I.113, Vocabulary of Terms for Broadband aspects of ISDN |publisher= ITU-T |date= June 1997 |orig-year= originally 1988 |access-date= 19 July 2011 |url-status= live |archive-url= https://web.archive.org/web/20121106141554/http://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-I.113-199706-I!!PDF-E |archive-date= 6 November 2012 }}</ref> A 2006 [[Organisation for Economic Co-operation and Development]] (OECD) report defined broadband as having download [[data transfer rates]] equal to or faster than 256&nbsp;kbit/s.<ref name="OECD">{{cite web |url=http://www.fcc.gov/cgb/broadband.html |title=2006 OECD Broadband Statistics to December 2006 |publisher=OECD |access-date=June 6, 2009 |url-status=dead |archive-url=https://web.archive.org/web/20090507202240/http://www.fcc.gov/cgb/broadband.html |archive-date=2009-05-07 }}</ref> And in 2015 the U.S. [[Federal Communications Commission]] (FCC) defined "Basic Broadband" as data transmission speeds of at least 25 Mbit/s downstream (from the Internet to the user's [[computer]]) and 3&nbsp;Mbit/s upstream (from the user's computer to the Internet).<ref>{{cite web |url=https://apps.fcc.gov/edocs_public/attachmatch/DOC-331760A1.pdf |title=FCC Finds U.S. Broadband Deployment Not Keeping Pace |publisher=FCC |access-date=January 29, 2015 |url-status=live |archive-url=https://web.archive.org/web/20150419074040/https://apps.fcc.gov/edocs_public/attachmatch/DOC-331760A1.pdf |archive-date=April 19, 2015 }}</ref> The trend is to raise the threshold of the broadband definition as higher data rate services become available.<ref name="engadget08">{{cite web |first=Nilay |last=Patel |url=https://www.engadget.com/2008/03/19/fcc-redefines-broadband-to-mean-768kbps-fast-to-mean-kinda/ |title=FCC redefines "broadband" to mean 768&nbsp;kbit/s, "fast" to mean "kinda slow" |publisher=Engadget |date=March 19, 2008 |access-date=June 6, 2009 |url-status=live |archive-url=https://web.archive.org/web/20090213175111/http://www.engadget.com/2008/03/19/fcc-redefines-broadband-to-mean-768kbps-fast-to-mean-kinda |archive-date=February 13, 2009 }}</ref>

The higher data rate dial-up modems and many broadband services are "asymmetric"—supporting much higher data rates for download (toward the user) than for upload (toward the Internet).

Data rates, including those given in this article, are usually defined and advertised in terms of the maximum or peak download rate. In practice, these maximum data rates are not always reliably available to the customer.<ref name="100mb"/> Actual end-to-end data rates can be lower due to a number of factors.<ref>{{cite news |author= Tom Phillips |title= 'Misleading' BT broadband ad banned |work= UK Metro |date= August 25, 2010 |url= http://www.metro.co.uk/tech/839014-misleading-bt-broadband-ad-banned |access-date= July 24, 2011 |url-status= live |archive-url= https://web.archive.org/web/20110906220840/http://www.metro.co.uk/tech/839014-misleading-bt-broadband-ad-banned |archive-date= September 6, 2011 }}</ref> In late June 2016, internet connection speeds averaged about 6 Mbit/s globally.<ref>{{cite news |author=Ben Munson |title=Akamai: Global average internet speeds have doubled since last Olympics |work=FierceOnlineVideo |date=June 29, 2016 |url=http://www.fierceonlinevideo.com/story/akamai-global-average-internet-speeds-have-doubled-last-olympics/2016-06-29 |access-date=June 30, 2016 |url-status=dead |archive-url=https://web.archive.org/web/20160702073650/http://www.fierceonlinevideo.com/story/akamai-global-average-internet-speeds-have-doubled-last-olympics/2016-06-29 |archive-date=July 2, 2016 }}</ref> Physical link quality can vary with distance and for wireless access with terrain, weather, building construction, antenna placement, and interference from other radio sources. Network bottlenecks may exist at points anywhere on the path from the end-user to the remote server or service being used and not just on the first or last link providing Internet access to the end-user.

===Network congestion===
Users may share access over a common network infrastructure. Since most users do not use their full connection capacity all of the time, this aggregation strategy (known as [[contended service]]) usually works well, and users can burst to their full data rate at least for brief periods. However, [[peer-to-peer]] (P2P) [[file sharing]] and high-quality streaming video can require high data-rates for extended periods, which violates these assumptions and can cause a service to become oversubscribed, resulting in congestion and poor performance. The TCP protocol includes flow-control mechanisms that automatically throttle back on the bandwidth being used during periods of [[network congestion]]. This is fair in the sense that all users that experience congestion receive less bandwidth, but it can be frustrating for customers and a major problem for ISPs. In some cases the amount of bandwidth actually available may fall below the threshold required to support a particular service such as video conferencing or streaming live video–effectively making the service unavailable.

When traffic is particularly heavy, an ISP can deliberately throttle back the bandwidth available to classes of users or for particular services. This is known as [[traffic shaping]] and careful use can ensure a better [[quality of service]] for time critical services even on extremely busy networks. However, overuse can lead to concerns about fairness and [[network neutrality]] or even charges of [[censorship]], when some types of traffic are severely or completely blocked.

===Outages===
An Internet blackout or outage can be caused by local signaling interruptions. Disruptions of [[submarine communications cable]]s may cause blackouts or slowdowns to large areas, such as in the [[2008 submarine cable disruption]].  Less-developed countries are more vulnerable due to a small number of high-capacity links.  Land cables are also vulnerable, as in 2011 when a woman digging for scrap metal severed most connectivity for the nation of Armenia.<ref>{{cite news|agency=The Guardian|url=https://www.theguardian.com/world/2011/apr/06/georgian-woman-cuts-web-access|title=Georgian woman cuts off web access to whole of Armenia|date=6 April 2011|access-date=11 April 2012|url-status=live|archive-url=https://web.archive.org/web/20130825075603/http://www.theguardian.com/world/2011/apr/06/georgian-woman-cuts-web-access|archive-date=25 August 2013}}</ref> Internet blackouts affecting almost entire countries can be achieved by governments as a form of [[Internet censorship]], as in the blockage of the [[Internet in Egypt]], whereby approximately 93%<ref name="renesys1">{{cite web |last=Cowie |first=James |title=Egypt Leaves the Internet |publisher=Renesys |url=http://www.renesys.com/blog/2011/01/egypt-leaves-the-internet.shtml |access-date=28 January 2011 |archive-url=https://web.archive.org/web/20110128080518/http://www.renesys.com/blog/2011/01/egypt-leaves-the-internet.shtml |archive-date=28 January 2011 |url-status=dead |df=dmy-all }}</ref> of networks were without access in 2011 in an attempt to stop mobilization for [[Egyptian Revolution of 2011|anti-government protests]].<ref>{{cite news | url=https://www.bbc.co.uk/news/technology-12306041 | work=BBC News | title=Egypt severs internet connection amid growing unrest | date=28 January 2011 | url-status=live | archive-url=https://web.archive.org/web/20120123164134/http://www.bbc.co.uk/news/technology-12306041 | archive-date=23 January 2012 }}</ref>

On April 25, 1997, due to a combination of human error and software bug, an incorrect routing table at MAI Network Service (a Virginia [[Internet service provider]]) propagated across backbone routers and caused major disruption to Internet traffic for a few hours.<ref>{{cite web|url=http://news.com/Router+glitch+cuts+Net+access/2100-1033_3-279235.html|title=Router glitch cuts Net access|date=1997-04-25|publisher=[[CNET]] News.com|access-date=2008-07-11}}</ref>

{{see also|AS 7007 incident|List of web host service outages}}

==Technologies==
When the Internet is accessed using a [[modem]], [[digital data]] is converted to [[analog signal|analog]] for transmission over analog networks such as the [[Public switched telephone network|telephone]] and [[Cable television|cable]] networks.<ref name="howstuffworks">[http://www.explainthatstuff.com/howbroadbandworks.html "How Broadband Works"] {{webarchive|url=https://web.archive.org/web/20110913021130/http://www.explainthatstuff.com//howbroadbandworks.html |date=2011-09-13 }}, Chris Woodford, Explain that Stuff, 20 August 2008. Retrieved 19 January.</ref> A computer or other device accessing the Internet would either be connected directly to a modem that communicates with an [[Internet service provider]] (ISP) or the modem's Internet connection would be shared via a [[Local Area Network]] (LAN) which provides access in a limited area such as a home, school, computer laboratory, or office building.

Although a connection to a LAN may provide very high data-rates within the LAN, actual Internet access speed is limited by the upstream link to the ISP. LANs may be wired or wireless. [[Ethernet]] over [[twisted pair]] cabling and [[Wi-Fi]] are the two most common technologies used to build LANs today, but [[ARCNET]], [[Token Ring]], [[Localtalk]], [[FDDI]], and other technologies were used in the past.

[[Ethernet]] is the name of the [[IEEE 802.3]] standard for physical LAN communication<ref>{{cite web |url=https://standards.ieee.org/about/get/802/802.3.html |title=Archived copy |access-date=2017-02-14 |url-status=live |archive-url=https://web.archive.org/web/20170124030206/http://standards.ieee.org/about/get/802/802.3.html |archive-date=2017-01-24 }}</ref> and [[Wi-Fi]] is a trade name for a [[wireless local area network]] (WLAN) that uses one of the [[IEEE 802.11]] standards.<ref>{{cite encyclopedia|title=Wi-Fi (wireless networking technology)|encyclopedia=Encyclopædia Britannica|url=http://www.britannica.com/EBchecked/topic/1473553/Wi-Fi|access-date=2010-02-03|url-status=live|archive-url=https://web.archive.org/web/20100627181935/http://www.britannica.com/EBchecked/topic/1473553/Wi-Fi|archive-date=2010-06-27}}</ref> Ethernet cables are interconnected via switches & routers. Wi-Fi networks are built using one or more wireless antenna called [[Wireless access point|access points]].

Many "modems" ([[cable modem]]s, [[DSL gateway]]s or [[Optical Network Terminal]]s (ONTs) provide the additional functionality to host a LAN so most Internet access today is through a LAN such as that created by a WiFi router connected to a modem or a combo modem router{{citation needed|date=November 2014}}, often a very small LAN with just one or two devices attached. And while LANs are an important form of Internet access, this raises the question of how and at what data rate the LAN itself is connected to the rest of the global Internet. The technologies described below are used to make these connections, or in other words, how customers' modems ([[Customer-premises equipment]]) are most often connected to internet service providers (ISPs).

===Dial-up technologies===
====Dial-up access====
{{main|Dial-up Internet access}}
{{Listen
|filename = Dial up modem noises.ogg
|title = "Dial up modem noises"
|description = Typical noises of a [[dial-up|dial-up modem]] while establishing connection with a local [[Internet service provider|ISP]] in order to get access to the [[Internet]].
|pos=right}}
[[Dial-up Internet access]] uses a modem and a phone call placed over the [[public switched telephone network]] (PSTN) to connect to a pool of modems operated by an ISP. The [[modem]] converts a computer's digital signal into an analog signal that travels over a phone line's [[local loop]] until it reaches a telephone company's switching facilities or central office (CO) where it is switched to another phone line that connects to another modem at the remote end of the connection.<ref name=Network>{{cite book|last=Dean|first=Tamara|title=Network+ Guide to Networks, 5th Ed|year=2010}}</ref>

Operating on a single channel, a dial-up connection monopolizes the phone line and is one of the slowest methods of accessing the Internet. Dial-up is often the only form of Internet access available in rural areas as it requires no new infrastructure beyond the already existing telephone network, to connect to the Internet. Typically, dial-up connections do not exceed a speed of 56 [[kbit/s]], as they are primarily made using modems that operate at a maximum data rate of 56 kbit/s downstream (towards the end user) and 34 or 48 kbit/s upstream (toward the global Internet).<ref name="howstuffworks" />

====Multilink dial-up====
[[Multilink striping|Multilink]] dial-up provides increased bandwidth by [[channel bonding]] multiple dial-up connections and accessing them as a single data channel.<ref>[http://www.56k.com/reports/bonding.shtml "Bonding: 112K, 168K, and beyond "] {{webarchive|url=https://web.archive.org/web/20070310194539/http://www.56k.com/reports/bonding.shtml |date=2007-03-10 }}, 56K.com</ref> It requires two or more modems, phone lines, and dial-up accounts, as well as an ISP that supports multilinking – and of course any line and data charges are also doubled. This [[inverse multiplexing]] option was briefly popular with some high-end users before ISDN, DSL and other technologies became available. [[Diamond Multimedia|Diamond]] and other vendors created special modems to support multilinking.<ref name="fail">[http://www.maximumpc.com/article/features/top_tech_blunders_10_products_massively_failed "Diamond 56k Shotgun Modem"] {{webarchive|url=https://web.archive.org/web/20120331173853/http://www.maximumpc.com/article/features/top_tech_blunders_10_products_massively_failed |date=2012-03-31 }}, maximumpc.com</ref>

===Hardwired broadband access===

The term ''[[broadband]]'' includes a broad range of technologies, all of which provide higher data rate access to the Internet. The following technologies use wires or cables in contrast to wireless broadband described later.

====Integrated Services Digital Network====
[[Integrated Services Digital Network]] (ISDN) is a switched telephone service capable of transporting voice and digital data, and is one of the oldest Internet access methods. ISDN has been used for voice, video conferencing, and broadband data applications. ISDN was very popular in Europe, but less common in North America. Its use peaked in the late 1990s before the availability of [[DSL]] and [[cable modem]] technologies.<ref>{{cite book |author=William Stallings |title=ISDN and Broadband ISDN with Frame Relay and ATM |edition=4th |publisher=Prentice Hall |year=1999 |page=542 |isbn=978-0139737442 |url=http://www.pearsonhighered.com/educator/product/ISDN-and-Broadband-ISDN-with-Frame-Relay-and-ATM-4E/9780139737442.page |url-status=live |archive-url=https://web.archive.org/web/20150924071103/http://www.pearsonhighered.com/educator/product/ISDN-and-Broadband-ISDN-with-Frame-Relay-and-ATM-4E/9780139737442.page |archive-date=2015-09-24 }}</ref>

Basic rate ISDN, known as ISDN-BRI, has two 64 kbit/s "bearer" or "B" channels. These channels can be used separately for voice or data calls or bonded together to provide a 128&nbsp;kbit/s service. Multiple ISDN-BRI lines can be bonded together to provide data rates above 128&nbsp;kbit/s. Primary rate ISDN, known as ISDN-PRI, has 23 bearer channels (64&nbsp;kbit/s each) for a combined data rate of 1.5&nbsp;Mbit/s (US standard). An ISDN E1 (European standard) line has 30 bearer channels and a combined data rate of 1.9&nbsp;Mbit/s.

====Leased lines====
[[Leased line]]s are dedicated lines used primarily by ISPs, business, and other large enterprises to connect LANs and campus networks to the Internet using the existing infrastructure of the [[Public switched telephone network|public telephone network]] or other providers. Delivered using wire, [[optical fiber]], and [[radio]], leased lines are used to provide Internet access directly as well as the building blocks from which several other forms of Internet access are created.<ref name="Horak">[http://www.wiley.com/WileyCDA/WileyTitle/productCd-0470396075.html ''Telecommunications and Data Communications Handbook''] {{webarchive|url=https://web.archive.org/web/20130308075758/http://www.wiley.com/WileyCDA/WileyTitle/productCd-0470396075.html |date=2013-03-08 }}, Ray Horak, 2nd edition, Wiley-Interscience, 2008, 791 p., {{ISBN|0-470-39607-5}}</ref>

[[T-carrier]] technology dates to 1957 and provides data rates that range from 56 and {{val|64|u=kbit/s}} ([[Digital Signal 0|DS0]]) to {{val|1.5|u=Mbit/s}} ([[Digital Signal 1|DS1]] or T1), to {{val|45|u=Mbit/s}} ([[Digital Signal 3|DS3]] or T3). A T1 line carries 24 voice or data channels (24 DS0s), so customers may use some channels for data and others for voice traffic or use all 24 channels for clear channel data. A DS3 (T3) line carries 28 DS1 (T1) channels. Fractional T1 lines are also available in multiples of a DS0 to provide data rates between 56 and {{val|1,500|u=kbit/s}}. T-carrier lines require special termination equipment that may be separate from or integrated into a router or switch and which may be purchased or leased from an ISP.<ref>{{cite book|last=Dean|first=Tamara|title=Network+ Guide to Networks|edition=5th|publisher=Course Technology, Cengage Learning|year=2009|url=http://www.cengage.com/search/productOverview.do?N=0&Ntk=P_Isbn13&Ntt=9781423902454|isbn=978-1-4239-0245-4|url-status=dead|archive-url=https://web.archive.org/web/20130420223256/http://www.cengage.com/search/productOverview.do?N=0&Ntk=P_Isbn13&Ntt=9781423902454|archive-date=2013-04-20}} pp 312–315.</ref> In Japan the equivalent standard is J1/J3. In Europe, a slightly different standard, [[E-carrier]], provides 32 user channels ({{val|64|u=kbit/s}}) on an E1 ({{val|2.0|u=Mbit/s}}) and 512 user channels or 16 E1s on an E3 ({{val|34.4|u=Mbit/s}}).

[[Synchronous Optical Networking]] (SONET, in the U.S. and Canada) and Synchronous Digital Hierarchy (SDH, in the rest of the world) are the standard multiplexing protocols used to carry high-data-rate digital bit-streams over optical fiber using [[lasers]] or highly [[coherent light]] from [[light-emitting diodes]] (LEDs). At lower transmission rates data can also be transferred via an electrical interface. The basic unit of framing is an [[OC-3c]] (optical) or [[Synchronous optical networking#The basic unit of transmission|STS-3]]c (electrical) which carries {{val|155.520|u=Mbit/s}}. Thus an OC-3c will carry three [[Optical Carrier#OC-1|OC-1]] (51.84 Mbit/s) payloads each of which has enough capacity to include a full DS3. Higher data rates are delivered in OC-3c multiples of four providing [[OC-12]]c ({{val|622.080|u=Mbit/s}}), [[OC-48]]c ({{val|2.488|u=Gbit/s}}), [[OC-192]]c ({{val|9.953|u=Gbit/s}}), and [[OC-768]]c (39.813 Gbit/s). The "c" at the end of the OC labels stands for "concatenated" and indicates a single data stream rather than several multiplexed data streams.<ref name="Horak" />

The 1, 10, 40, and 100 gigabit Ethernet ([[GbE]], [[10 GbE]], [[100 Gigabit Ethernet|40/100 GbE]]) [[IEEE 802.3|IEEE standards (802.3)]] allow digital data to be delivered over copper wiring at distances to 100&nbsp;m and over optical fiber at distances to {{val|40|u=km}}.<ref>[http://www.ieee802.org/3/ "IEEE 802.3 Ethernet Working Group"] {{webarchive|url=https://web.archive.org/web/20141012182235/http://www.ieee802.org/3/ |date=2014-10-12 }}, web page, IEEE 802 LAN/MAN Standards Committee, accessed 8 May 2012</ref>

====Cable Internet access====
{{main|Cable Internet access}}
Cable Internet provides access using a [[cable modem]] on [[Hybrid fibre-coaxial|hybrid fiber coaxial]] wiring originally developed to carry television signals. Either fiber-optic or coaxial copper cable may connect a node to a customer's location at a connection known as a cable drop. In a [[cable modem termination system]], all nodes for cable subscribers in a neighborhood connect to a cable company's central office, known as the "head end." The cable company then connects to the Internet using a variety of means – usually fiber optic cable or digital satellite and microwave transmissions.<ref name="Dean322">{{cite book|last=Dean|first=Tamara|title=Network+ Guide to Networks|edition=5th|publisher=Course Technology, Cengage Learning|year=2009|url=http://www.cengage.com/search/productOverview.do?N=0&Ntk=P_Isbn13&Ntt=9781423902454|isbn=978-1-4239-0245-4|url-status=dead|archive-url=https://web.archive.org/web/20130420223256/http://www.cengage.com/search/productOverview.do?N=0&Ntk=P_Isbn13&Ntt=9781423902454|archive-date=2013-04-20}} p 322.</ref> Like DSL, broadband cable provides a continuous connection with an ISP.

[[Downstream (computer science)|Downstream]], the direction toward the user, bit rates can be as much as 1000&nbsp;[[Mbit/s]] in some countries, with the use of [[DOCSIS]] 3.1. Upstream traffic, originating at the user, ranges from 384&nbsp;kbit/s to more than 50&nbsp;Mbit/s. DOCSIS 4.0 promises up to 10 Gbit/s downstream ands 6 Gbit/s upstream, however this technology is yet to have been implemented in real world usage. Broadband cable access tends to service fewer business customers because existing television cable networks tend to service residential buildings; commercial buildings do not always include wiring for coaxial cable networks.<ref>{{cite book|last=Dean|first=Tamara|title=Network+ Guide to Networks|edition=5th|publisher=Course Technology, Cengage Learning|year=2009|url=http://www.cengage.com/search/productOverview.do?N=0&Ntk=P_Isbn13&Ntt=9781423902454|isbn=978-1-4239-0245-4|url-status=dead|archive-url=https://web.archive.org/web/20130420223256/http://www.cengage.com/search/productOverview.do?N=0&Ntk=P_Isbn13&Ntt=9781423902454|archive-date=2013-04-20}} p 323.</ref> In addition, because broadband cable subscribers share the same local line, communications may be intercepted by neighboring subscribers. Cable networks regularly provide encryption schemes for data traveling to and from customers, but these schemes may be thwarted.<ref name="Dean322"/>

====Digital subscriber line (DSL, ADSL, SDSL, and VDSL)====
[[Digital subscriber line]] (DSL) service provides a connection to the Internet through the telephone network. Unlike dial-up, DSL can operate using a single phone line without preventing normal use of the telephone line for voice phone calls. DSL uses the high frequencies, while the low (audible) frequencies of the line are left free for [[Plain old telephone service|regular telephone]] communication.<ref name="howstuffworks" /> These frequency bands are subsequently separated by filters installed at the customer's premises.

DSL originally stood for "digital subscriber loop". In telecommunications marketing, the term digital subscriber line is widely understood to mean [[asymmetric digital subscriber line]] (ADSL), the most commonly installed variety of DSL. The data throughput of consumer DSL services typically ranges from 256&nbsp;kbit/s to 20&nbsp;Mbit/s in the direction to the customer (downstream), depending on DSL technology, line conditions, and service-level implementation. In ADSL, the data throughput in the upstream direction, (i.e., in the direction to the service provider) is lower than that in the downstream direction (i.e. to the customer), hence the designation of asymmetric.<ref>[http://whirlpool.net.au/wiki/?tag=ADSL_Theory "ADSL Theory"] {{webarchive|url=https://web.archive.org/web/20100724040222/http://whirlpool.net.au/wiki/?tag=ADSL_Theory |date=2010-07-24 }}, Australian broadband news and information, Whirlpool, accessed 3 May 2012</ref> With a [[symmetric digital subscriber line]] (SDSL), the downstream and upstream data rates are equal.<ref>[http://docwiki.cisco.com/wiki/Digital_Subscriber_Line#SDSL "SDSL"] {{webarchive|url=https://web.archive.org/web/20120418172858/http://docwiki.cisco.com/wiki/Digital_Subscriber_Line |date=2012-04-18 }}, ''Internetworking Technology Handbook'', Cisco DocWiki, 17 December 2009, accessed 3 May 2012</ref>

[[Very-high-bit-rate digital subscriber line]] ([[VDSL]] or VHDSL, ITU G.993.1)<ref>{{cite web|url=http://www.kpn.com/artikel.htm?contentid=2895 |publisher=[[KPN]] |title=KPN starts VDSL trials |url-status=dead |archive-url=https://web.archive.org/web/20080504192232/http://www.kpn.com/Artikel.htm?contentid=2895 |archive-date=2008-05-04 }}</ref> is a digital subscriber line (DSL) standard approved in 2001 that provides data rates up to 52&nbsp;Mbit/s downstream and 16&nbsp;Mbit/s upstream over copper wires<ref>{{cite web |url=http://computer.howstuffworks.com/vdsl2.htm |publisher=[[HowStuffWorks]] |title=VDSL Speed |url-status=live |archive-url=https://web.archive.org/web/20100312075145/http://computer.howstuffworks.com/vdsl2.htm |archive-date=2010-03-12 |date=2001-05-21 }}</ref> and up to 85 Mbit/s down- and upstream on coaxial cable.<ref>{{cite web |url=http://www.etherwan.com/Product/ViewProduct.asp?View=64 |archive-url=https://web.archive.org/web/20110710203152/http://www.etherwan.com/Product/ViewProduct.asp?View=64 |url-status=dead |archive-date=2011-07-10 |publisher=EtherWAN |title=Industrial VDSL Ethernet Extender Over Coaxial Cable, ED3331 }}</ref> VDSL is capable of supporting applications such as high-definition television, as well as telephone services ([[voice over IP]]) and general Internet access, over a single physical connection.

[[VDSL2]] ([[ITU-T]] [[G.993.2]]) is a second-generation version and an enhancement of VDSL.<ref name="press">{{Cite news |title= New ITU Standard Delivers 10x ADSL Speeds: Vendors applaud landmark agreement on VDSL2 |date= 27 May 2005 |work= News release |publisher= International Telecommunication Union |url= http://www.itu.int/newsroom/press_releases/2005/06.html |access-date= 22 September 2011 |url-status= live |archive-url= https://web.archive.org/web/20160903203113/http://www.itu.int/newsroom/press_releases/2005/06.html |archive-date= 3 September 2016 }}</ref> Approved in February 2006, it is able to provide data rates exceeding 100&nbsp;Mbit/s simultaneously in both the upstream and downstream directions. However, the maximum data rate is achieved at a range of about 300 meters and performance degrades as distance and loop [[attenuation]] increases.

====DSL Rings====
[[DSL Rings]] (DSLR) or Bonded DSL Rings is a ring topology that uses DSL technology over existing copper telephone wires to provide data rates of up to 400&nbsp;Mbit/s.<ref name="financialpost">{{cite news
 |last        = Sturgeon
 |first       = Jamie
 |title       = A smarter route to high-speed Net
 |publisher   = [[National Post]]
 |work        = FP Entrepreneur
 |date        = October 18, 2010
 |url         = http://www.financialpost.com/entrepreneur/smarter+route+high+speed/3687154/story.html
 |access-date  = January 7, 2011
 |url-status     = dead
 |archive-url  = https://web.archive.org/web/20101023013214/http://www.financialpost.com/entrepreneur/smarter+route+high+speed/3687154/story.html
 |archive-date = October 23, 2010
 |df          = mdy-all
}}</ref>

====Fiber to the home====
[[Fiber to the x|Fiber-to-the-home]] (FTTH) is one member of the Fiber-to-the-x (FTTx) family that includes Fiber-to-the-building or basement (FTTB), Fiber-to-the-premises (FTTP), Fiber-to-the-desk (FTTD), Fiber-to-the-curb (FTTC), and Fiber-to-the-node (FTTN).<ref name="council">{{cite web |title= FTTH Council – Definition of Terms |date= January 9, 2009 |url= http://ftthcouncil.eu/documents/Reports/FTTH-Definitions-Revision_January_2009.pdf |publisher= FTTH Council |access-date= September 1, 2011 }}{{dead link|date=September 2017 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> These methods all bring data closer to the end user on optical fibers. The differences between the methods have mostly to do with just how close to the end user the delivery on fiber comes. All of these delivery methods are similar in function to [[hybrid fiber-coaxial]] (HFC) systems used to provide cable Internet access. Fiber internet connections to customers are either AON ([[Active optical network]]) or more commonly PON ([[Passive optical network]]). Examples of fiber optic internet access standards are  [[G.984]] (GPON, G-PON) and [[10G-PON]] (XG-PON).

The use of [[Fiber-optic communication|optical fiber]] offers much higher data rates over relatively longer distances. Most high-capacity Internet and cable television backbones already use fiber optic technology, with data switched to other technologies (DSL, cable, LTE) for final delivery to customers.<ref>[http://www.fiopt.com/primer.php "FTTx Primer"] {{webarchive|url=https://web.archive.org/web/20081011033903/http://www.fiopt.com/primer.php |date=2008-10-11 }}, Fiopt Communication Services (Calgary), July 2008</ref>

In 2010, Australia began rolling out its [[National Broadband Network]] across the country using fiber-optic cables to 93 percent of Australian homes, schools, and businesses.<ref>[http://www.abc.net.au/news/2010-08-12/big-gig-nbn-to-be-10-times-faster/941408 "Big gig: NBN to be 10 times faster"] {{webarchive|url=https://web.archive.org/web/20120429192147/http://www.abc.net.au/news/2010-08-12/big-gig-nbn-to-be-10-times-faster/941408 |date=2012-04-29 }}, Emma Rodgers, ''ABC News'', Australian Broadcasting Corporation, 12 August 2010</ref>  The project was abandoned by the subsequent LNP government, in favour of a hybrid FTTN design, which turned out to be more expensive and introduced delays.  Similar efforts are underway in Italy, Canada, India, and many other countries (see [[Fiber to the premises by country]]).<ref>[http://www.telecomseurope.net/content/italy-gets-fiber-back-track "Italy gets fiber back on track"] {{webarchive|url=https://web.archive.org/web/20120322205235/http://www.telecomseurope.net/content/italy-gets-fiber-back-track |date=2012-03-22 }}, Michael Carroll, TelecomsEMEA.net, 20 September 2010</ref><ref>[http://www.freevoipcallsolution.com/2010/08/pirelli-broadband-solutions-technology.html "Pirelli Broadband Solutions, the technology partner of fastweb network Ngan"] {{webarchive|url=https://web.archive.org/web/20120328111850/http://www.freevoipcallsolution.com/2010/08/pirelli-broadband-solutions-technology.html |date=2012-03-28 }}, 2 August 2010</ref><ref>[http://www.fiercetelecom.com/story/telecom-italia-rolls-out-100-mbps-ftth-services-catania/2010-11-03 "Telecom Italia rolls out 100 Mbps FTTH services in Catania"] {{webarchive|url=https://web.archive.org/web/20101231123152/http://www.fiercetelecom.com/story/telecom-italia-rolls-out-100-mbps-ftth-services-catania/2010-11-03 |date=2010-12-31 }}, Sean Buckley, FierceTelecom, 3 November 2010</ref><ref>[http://www.sasktel.com/about-us/news/2011-news-releases/sasktel-announces-2011-network-investment-and-fiber-to-the-premises.html "SaskTel Announces 2011 Network Investment and Fiber to the Premises Program"] {{webarchive|url=https://archive.today/20120911184530/http://www.sasktel.com/about-us/news/2011-news-releases/sasktel-announces-2011-network-investment-and-fiber-to-the-premises.html |date=2012-09-11 }}, SaskTel, Saskatchewan Telecommunications Holding Corporation, 5 April 2011</ref>

====Power-line Internet====
[[Power-line Internet]], also known as [[Broadband over power lines]] (BPL), carries Internet data on a conductor that is also used for [[electric power transmission]].<ref name="BERGU14">{{cite book|last1=Berger|first1=Lars T.|last2=Schwager|first2=Andreas|last3=Pagani|first3=Pascal|last4=Schneider|first4=Daniel M.|date=February 2014|title=MIMO Power Line Communications: Narrow and Broadband Standards, EMC, and Advanced Processing|publisher=CRC Press|series=Devices, Circuits, and Systems|isbn=9781466557529|doi=10.1201/b16540-1}}{{Dead link|date=January 2019 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> Because of the extensive power line infrastructure already in place, this technology can provide people in rural and low population areas access to the Internet with little cost in terms of new transmission equipment, cables, or wires. Data rates are asymmetric and generally range from 256 kbit/s to 2.7 Mbit/s.<ref name="HSW-BPL">[http://computer.howstuffworks.com/bpl.htm "How Broadband Over Powerlines Works"] {{webarchive|url=https://web.archive.org/web/20120512090550/http://computer.howstuffworks.com/bpl.htm |date=2012-05-12 }}, Robert Valdes, ''How Stuff Works'', accessed 5 May 2012</ref>

Because these systems use parts of the radio spectrum allocated to other over-the-air communication services, interference between the services is a limiting factor in the introduction of power-line Internet systems. The [[IEEE P1901]] standard specifies that all power-line protocols must detect existing usage and avoid interfering with it.<ref name="HSW-BPL" />

Power-line Internet has developed faster in Europe than in the U.S. due to a historical difference in power system design philosophies. Data signals cannot pass through the step-down transformers used and so a repeater must be installed on each transformer.<ref name="HSW-BPL" /> In the U.S. a transformer serves a small cluster of from one to a few houses. In Europe, it is more common for a somewhat larger transformer to service larger clusters of from 10 to 100 houses. Thus a typical U.S. city requires an order of magnitude more repeaters than a comparable European city.<ref>[http://electrical-engineering-portal.com/north-american-versus-european-distribution-systems "North American versus European distribution systems"] {{webarchive|url=https://web.archive.org/web/20120507211603/http://electrical-engineering-portal.com/north-american-versus-european-distribution-systems |date=2012-05-07 }}, Edvard, Technical articles, Electrical Engineering Portal, 17 November 2011</ref>

====ATM and Frame Relay====
[[Asynchronous Transfer Mode]] (ATM) and [[Frame Relay]] are wide-area networking standards that can be used to provide Internet access directly or as building blocks of other access technologies. For example, many DSL implementations use an ATM layer over the low-level bitstream layer to enable a number of different technologies over the same link. Customer LANs are typically connected to an ATM switch or a Frame Relay node using leased lines at a wide range of data rates.<ref>[http://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-I.150-199902-I!!PDF-E&type=items ''B-ISDN asynchronous transfer mode functional characteristics''] {{webarchive|url=https://web.archive.org/web/20121012161801/http://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-I.150-199902-I!!PDF-E&type=items |date=2012-10-12 }}, ITU-T Recommendation I.150, February 1999, International Telecommunications Union</ref><ref>[http://searchenterprisewan.techtarget.com/definition/frame-relay "Frame Relay"] {{webarchive|url=https://web.archive.org/web/20120409171824/http://searchenterprisewan.techtarget.com/definition/frame-relay |date=2012-04-09 }}, Margaret Rouse, TechTarget, September 2005</ref>

While still widely used, with the advent of Ethernet over optical fiber, [[MPLS]], [[VPN]]s and broadband services such as [[cable modem]] and [[Digital subscriber line|DSL]], ATM and Frame Relay no longer play the prominent role they once did.

===Wireless broadband access===
[[Wireless broadband]] is used to provide both fixed and mobile Internet access with the following technologies.

====Satellite broadband====
[[File:Ghana satellite.jpg|thumb|Satellite Internet access via [[VSAT]] in Ghana]]

[[Satellite Internet access]] provides fixed, portable, and mobile Internet access.<ref>[http://iml.jou.ufl.edu/projects/Fall99/Coffey/ "Internet in the Sky"] {{webarchive|url=https://web.archive.org/web/20121216120858/http://iml.jou.ufl.edu/projects/Fall99/Coffey/ |date=2012-12-16 }}, D.J. Coffey, accessed 8 May 2012</ref> Data rates range from 2 kbit/s to 1 Gbit/s downstream and from 2 kbit/s to 10 Mbit/s upstream. In the northern hemisphere, satellite antenna dishes require a clear line of sight to the southern sky, due to the equatorial position of all geostationary satellites. In the southern hemisphere, this situation is reversed, and dishes are pointed north.<ref name=how>[http://computer.howstuffworks.com/question606.htm "How does satellite Internet operate?"] {{webarchive|url=https://web.archive.org/web/20110927053708/http://computer.howstuffworks.com/question606.htm |date=2011-09-27 }}, How Stuff Works, Retrieved 5 March 2009.</ref><ref name=geostationary>{{cite web| url=http://searchmobilecomputing.techtarget.com/definition/geostationary-satellite| title=Geostationary Satellite Definition| author=Margaret Rouse| publisher=Search Mobile Computing| access-date=June 24, 2015| url-status=dead| archive-url=https://web.archive.org/web/20150610040610/http://searchmobilecomputing.techtarget.com/definition/geostationary-satellite| archive-date=June 10, 2015}}</ref> Service can be adversely affected by moisture, rain, and snow (known as rain fade).<ref name=how/><ref name=geostationary/><ref>{{cite web| url=http://searchmobilecomputing.techtarget.com/definition/rain-fade| title=Rain Fade Definition| author=Margaret Rouse| publisher=Search Mobile Computing| access-date=June 24, 2015| url-status=live| archive-url=https://web.archive.org/web/20150622005223/http://searchmobilecomputing.techtarget.com/definition/rain-fade| archive-date=June 22, 2015}}</ref> The system requires a carefully aimed directional antenna.<ref name=geostationary/>

Satellites in geostationary Earth orbit (GEO) operate in a fixed position {{convert|35,786|km|mi|abbr=on}} above the Earth's equator. At the speed of light (about {{convert|300,000|km/s|mi/s|abbr=in|disp=or|sigfig=3}}), it takes a quarter of a second for a radio signal to travel from the Earth to the satellite and back. When other switching and routing delays are added and the delays are doubled to allow for a full round-trip transmission, the total delay can be 0.75 to 1.25 seconds. This latency is large when compared to other forms of Internet access with typical latencies that range from 0.015 to 0.2 seconds. Long latencies negatively affect some applications that require real-time response, particularly online games, [[voice over IP]], and remote control devices.<ref>{{cite book| title=The Basics of Satellite Communication| author=Joseph N. Pelton| date=2006| publisher=Professional Education International, Inc.| isbn=978-1-931695-48-0}}</ref><ref>{{cite book| title=The First 100 Feet: Options for Internet and Broadband Access| author=Deborah Hurley, James H. Keller| date=1999| publisher=Harvard college| isbn=978-0-262-58160-8| url-access=registration| url=https://archive.org/details/first100feetopti00debo}}</ref> [[TCP tuning]] and [[TCP acceleration]] techniques can mitigate some of these problems. GEO satellites do not cover the Earth's polar regions.<ref name=how/> [[HughesNet]], [[Exede]], [[AT&T]] and [[Dish Network]] have GEO systems.<ref>{{cite web| url=http://about.att.com/mediakit/broadband| title=AT&T Broadband Services| publisher=ATT| access-date=June 24, 2015| url-status=live| archive-url=https://web.archive.org/web/20150610121009/http://about.att.com/mediakit/broadband| archive-date=June 10, 2015}}</ref><ref>{{cite web| url=http://www.hughesnet.com/| title=Home| publisher=Hughes Net| access-date=June 24, 2015| url-status=live| archive-url=https://web.archive.org/web/20150623192705/http://www.hughesnet.com/| archive-date=June 23, 2015}}</ref><ref>{{cite web| url=http://www.exede.com/| title=Home| publisher=Exede Internet| access-date=June 24, 2015| url-status=live| archive-url=https://web.archive.org/web/20150617072311/http://www.exede.com/| archive-date=June 17, 2015}}</ref><ref>{{cite web| url=http://www.dish.com/bundles/| title=Bundles| publisher=Dish Network| access-date=June 24, 2015| url-status=live| archive-url=https://web.archive.org/web/20150613031716/http://www.dish.com/bundles/| archive-date=June 13, 2015}}</ref>

Satellites in [[low Earth orbit]] (LEO, below {{convert|2000|km|mi|abbr=in|disp=or|sigfig=4}}) and [[medium Earth orbit]] (MEO, between {{convert|2000|and|35786|km|disp=or|abbr=in}}) are less common, operate at lower altitudes, and are not fixed in their position above the Earth. Lower altitudes allow lower latencies and make real-time interactive Internet applications more feasible. LEO systems include [[Globalstar]] and [[Iridium satellite constellation|Iridium]]. The [[O3b MEO]] constellation is a medium Earth orbit system with a latency of 125 ms. COMMStellation™ is a LEO system, scheduled for launch in 2015,{{Update inline|date=April 2021}} that is expected to have a latency of just 7&nbsp;ms.

====Mobile broadband====
[[File:Mobile Broadband service mark.jpg|thumb |150px |Service mark for [[GSM Association|GSMA]] ]]
[[Mobile broadband]] is the marketing term for wireless Internet access delivered through mobile phone towers ([[cellular network]]s) to computers, [[mobile phone]]s (called "cell phones" in North America and South Africa, and "hand phones" in Asia), and other digital devices using [[portable modem]]s. Some mobile services allow more than one device to be connected to the Internet using a single cellular connection using a process called [[tethering]]. The modem may be built into laptop computers, tablets, mobile phones, and other devices, added to some devices using [[PC card]]s, [[USB modem]]s, and [[USB sticks]] or [[PC Card dongle|dongles]], or separate [[wireless modem]]s can be used.<ref name="ergen">{{cite book |title= Mobile Broadband: including WiMAX and LTE |publisher= Springer Science+Business Media |year= 2009 |author= Mustafa Ergen |isbn= 978-0-387-68189-4 |doi= 10.1007/978-0-387-68192-4 }}</ref>

New mobile phone technology and infrastructure is introduced periodically and generally involves a change in the fundamental nature of the service, non-backwards-compatible transmission technology, higher peak data rates, new frequency bands, wider channel frequency bandwidth in Hertz becomes available. These transitions are referred to as generations. The first mobile data services became available during the second generation (2G).

{| class="wikitable" style="float:left; margin-top:5px; margin-right:20px; line-height:1.2em;"
|+ style="padding-bottom:1px;" |[[2G|Second generation (2G)]]&nbsp;<span style="font-weight:normal">from 1991:</span>
|- style="font-style:italic; padding-top:1px; padding-bottom:1px; line-height:0.9em; font-size:90%;"
|  style="font-weight:normal; border:solid 1px white; border-right:inherit; background:white; text-align:right;"|Speeds in kbit/s
! colspan=2 style="font-weight:normal; border-bottom:solid 1px #888888;" |down and up
|-
| style="border:solid 1px white; border-right:inherit; background:white;"|{{·}} [[Circuit Switched Data|GSM CSD]] 
| style="text-align:center;" colspan="2"| 9.6 kbit/s
|-
| style="border:solid 1px white; border-right:inherit; background:white;"|{{·}} [[Cellular digital packet data|''CDPD'']] 
| colspan="2" style="text-align:center;"| up to 19.2 kbit/s
|-
| style="border:solid 1px white; border-right:inherit; background:white;"|{{·}} [[General Packet Radio Service|GSM GPRS]] (2.5G)
| colspan="2" style="text-align:center;"| 56 to 115 kbit/s
|-
| style="border:solid 1px white; border-right:inherit; background:white;"|{{·}} [[Enhanced Data Rates for GSM Evolution|GSM EDGE]] (2.75G)&nbsp;
| colspan="2" style="text-align:center;"| up to 237 kbit/s
|}

{| class="wikitable" style="float:left; margin-top:5px; margin-right:15px; line-height:1.2em;"
|+ style="padding-bottom:1px;" |[[3G|Third generation (3G)]]&nbsp;<span style="font-weight:normal">from 2001:</span>
|- style="font-style:italic; padding-top:1px; padding-bottom:1px; line-height:0.9em; font-size:90%;"
|  style="font-weight:normal; border:solid 1px white; border-right:inherit; background:white; text-align:right;"|Speeds in Mbit/s
! style="font-weight:normal; border-bottom:solid 1px #888888;" |down
! style="font-weight:normal; border-bottom:solid 1px #888888;" |up
|-
| style="border:solid 1px white; border-right:inherit; background:white;"|{{·}} [[W-CDMA (UMTS)|UMTS W-CDMA]]
| colspan="2" style="text-align:center;"|0.4 Mbit/s
|-
| style="border:solid 1px white; border-right:inherit; background:white;"|{{·}} [[High Speed Packet Access|UMTS HSPA]]
|align=center | 14.4
|align=center | 5.8
|-
| style="border:solid 1px white; border-right:inherit; background:white;"|{{·}} [[UMTS-TDD|UMTS TDD]]
| colspan="2"  style="text-align:center; border-bottom:solid 1px #888888;"|16 Mbit/s
|-
| style="border:solid 1px white; border-right:inherit; background:white;"|{{·}} [[CDMA2000|CDMA2000 1xRTT]]
|align=center | 0.3
|align=center | 0.15
|-
| style="border:solid 1px white; border-right:inherit; background:white;"|{{·}} ''[[CDMA2000|CDMA2000 EV-DO]]''
|style="border-bottom:solid 1px #888888;" |2.5–4.9
|style="border-bottom:solid 1px #888888;" |0.15–1.8
|-
| style="border:solid 1px white; border-right:inherit; background:white;"|{{·}} [[Evolved EDGE|GSM EDGE-Evolution]]&nbsp;
|align=center | 1.6
|align=center | 0.5
|}

{| class="wikitable" style="float:left; width:auto; max-width:281px; margin-top:5px; margin-right:10px; line-height:1.3em;"
|+ style="padding-bottom:1px;" |[[4G|Fourth generation (4G)]]&nbsp;<span style="font-weight:normal">from 2006:</span>
|- style="font-style:italic; padding-top:1px; padding-bottom:1px; line-height:0.8em; font-size:90%;"
| colspan="2"  style="font-weight:normal; border:solid 1px white; border-right:inherit; background:white; text-align:right;"|Speeds in Mbit/s
! style="font-weight:normal;" |down
! style="font-weight:normal;" |up
|-
| style="border:solid 1px white; background:white;"|{{·}}
| style="border:solid 1px white; border-right:inherit; background:white;"|[[HSPA+]]
| align=center |21–672
| align=center nowrap |5.8–168
|- valign=top
| style="border:solid 1px white; background:white;"|{{·}}
|  style="white-space:nowrap; border:solid 1px white; border-right:inherit; background:white;"|[[Mobile WiMAX]] (802.16)
| align=center |37–365
| align=center |17–376
|-
| style="border:solid 1px white; background:white;"|{{·}}
| style="border:solid 1px white; border-right:inherit; background:white;"|[[3GPP Long Term Evolution|LTE]]
| align=center nowrap |100–300
| align=center |50–75
|- valign=top
| style="border:solid 1px white; background:white;"|{{·}}
| style="border:solid 1px white; background:white; border-right:inherit;"|[[LTE-Advanced]]:
|  style="text-align:center; white-space:nowrap;" colspan="2"|&nbsp;
|-
| style="border:solid 1px white; background:white;"|&nbsp;
| style="border:solid 1px white; border-right:inherit; background:white;"|{{·}} moving at higher speeds
| style="text-align:center;" colspan="2"|100 Mbit/s
|-
| style="border:solid 1px white; background:white;"|&nbsp;
| style="border:solid 1px white; border-right:inherit; background:white;"|{{·}} not moving or moving at lower speeds
| style="text-align:center;" colspan="2"|up to 1000 Mbit/s
|-
| style="border:solid 1px white; background:white;"|{{·}}
| style="border:solid 1px white; border-right:inherit; background:white;"|''[[IEEE 802.20|MBWA]] (802.20)''
| style="text-align:center;" colspan="2"|80 Mbit/s
|}
{{clear|both}}
The download (to the user) and upload (to the Internet) data rates given above are peak or maximum rates and end users will typically experience lower data rates.

[[WiMAX]] was originally developed to deliver fixed wireless service with wireless mobility added in 2005. CDPD, CDMA2000 EV-DO, and MBWA are no longer being actively developed.

In 2011, 90% of the world's population lived in areas with 2G coverage, while 45% lived in areas with 2G and 3G coverage.<ref name=ITU-ITCFacts>[http://www.itu.int/ITU-D/ict/facts/2011/material/ICTFactsFigures2011.pdf "The World in 2011: ITC Facts and Figures"] {{webarchive|url=https://web.archive.org/web/20120510070621/http://www.itu.int/ITU-D/ict/facts/2011/material/ICTFactsFigures2011.pdf |date=2012-05-10 }}, International Telecommunications Unions (ITU), Geneva, 2011</ref>

====Fixed wireless====
Wireless internet connections that do not use a satellite nor are designed to support moving equipment such as smartphones due to the use of, for example, [[customer premises equipment]] such as antennas that can't be moved over a significant geographical area without losing the signal from the ISP, unlike smartphones.
=====WiMAX=====
Worldwide Interoperability for Microwave Access ([[WiMAX]]) is a set of interoperable implementations of the [[IEEE 802.16]] family of wireless-network standards certified by the [[WiMAX Forum]]. It enables "the delivery of [[last mile]] wireless broadband access as an alternative to cable and DSL".<ref>{{cite web|url=http://www.wimaxforum.org/technology/ |title=WiMax Forum – Technology |access-date=2008-07-22 |url-status=dead |archive-url=https://web.archive.org/web/20080722062158/http://www.wimaxforum.org/technology/ |archive-date=2008-07-22 }}</ref> The original IEEE 802.16 standard, now called "Fixed WiMAX", was published in 2001 and provided 30 to 40 megabit-per-second data rates.<ref>{{cite web |url= http://www.itbusinessedge.com/cm/community/features/interviews/blog/speeding-up-wimax/?cs=40726 |title= Speeding Up WiMax |author= Carl Weinschenk |date= 16 April 2010 |work= IT Business Edge |quote= Today the initial WiMax system is designed to provide 30 to 40 megabit-per-second data rates. |access-date= 31 August 2011 |url-status= live |archive-url= https://web.archive.org/web/20110905081903/http://www.itbusinessedge.com/cm/community/features/interviews/blog/speeding-up-wimax/?cs=40726 |archive-date= 5 September 2011 }}</ref> Mobility support was added in 2005. A 2011 update provides data rates up to 1 Gbit/s for fixed stations. WiMax offers a metropolitan area network with a signal radius of about 50&nbsp;km (30 miles), far surpassing the 30-metre (100-foot) wireless range of a conventional [[Wi-Fi]] [[local area network]] (LAN). WiMAX signals also penetrate building walls much more effectively than Wi-Fi. WiMAX is most often used as a fixed wireless standard.

=====Wireless ISP=====
[[File:Wi-Fi Logo.svg|thumb|150px|Wi-Fi logo]]
[[Wireless Internet service provider]]s (WISPs) operate independently of [[mobile phone operator]]s. WISPs typically employ low-cost IEEE 802.11 [[Wi-Fi]] radio systems to link up remote locations over great distances ([[Long-range Wi-Fi]]), but may use other higher-power radio communications systems as well, such as microwave and WiMAX.
[[File:WI-FI Range Diagram.svg|thumb|Wi-Fi range diagram]]
Traditional 802.11a/b/g/n/ac is an unlicensed omnidirectional service designed to span between 100 and 150&nbsp;m (300 to 500&nbsp;ft). By focusing the radio signal using a [[directional antenna]] (where allowed by regulations), 802.11 can operate reliably over a distance of many km(miles), although the technology's line-of-sight requirements hamper connectivity in areas with hilly or heavily foliated terrain. In addition, compared to hard-wired connectivity, there are security risks (unless robust security protocols are enabled); data rates are usually slower (2 to 50 times slower); and the network can be less stable, due to interference from other wireless devices and networks, weather and line-of-sight problems.<ref>{{cite book|title=Certified Wireless Network Administrator Official Study Guide|url=https://books.google.com/books?id=QnMunBGVDuMC&q=cwna+official+study+guide|author=Joshua Bardwell|author2=Devin Akin|page=418|publisher=[[McGraw-Hill]]|year=2005|edition=Third|isbn=978-0-07-225538-6|url-status=live|archive-url=https://web.archive.org/web/20170109135240/https://books.google.com/books?id=QnMunBGVDuMC&printsec=frontcover&dq=cwna+official+study+guide&hl=en&ei=EJaXTpSaFMPSiALTu4HCDQ&sa=X&oi=book_result&ct=result&resnum=1&ved=0CDAQ6AEwAA#v=onepage&q&f=false|archive-date=2017-01-09}}</ref>

With the increasing popularity of unrelated consumer devices operating on the same 2.4&nbsp;GHz band, many providers have migrated to the [[List of WLAN channels#5 GHz (802.11a/h/j/n/ac/ax)|5GHz ISM band]]. If the service provider holds the necessary spectrum license, it could also reconfigure various brands of off the shelf Wi-Fi hardware to operate on its own band instead of the crowded unlicensed ones. Using higher frequencies carries various advantages:
* usually regulatory bodies allow for more power and using (better-) directional antennae,
* there exists much more bandwidth to share, allowing both better throughput and improved coexistence,
* there are fewer consumer devices that operate over 5&nbsp;GHz than over 2.4&nbsp;GHz, hence fewer interferers are present,
* the shorter wavelengths don't propagate as well through walls and other structures, so much less interference leaks outside of the homes of consumers.

Proprietary technologies like [[Motorola Canopy]] & Expedience can be used by a WISP to offer wireless access to rural and other markets that are hard to reach using Wi-Fi or WiMAX. There are a number of companies that provide this service.<ref>[http://www.wispa.org/directories/member-directory "Member Directory"] {{webarchive|url=https://web.archive.org/web/20170220031021/http://www.wispa.org/Directories/Member-Directory |date=2017-02-20 }}, Wireless Internet Service Providers’ Association (WISPA), accessed 5 May 2012</ref>

=====Local Multipoint Distribution Service=====
[[Local Multipoint Distribution Service]] (LMDS) is a broadband wireless access technology that uses microwave signals operating between 26&nbsp;GHz and 29&nbsp;GHz.<ref>[http://www.cse.wustl.edu/~jain/cis788-99/ftp/lmds/index.html "Local Multipoint Distribution Service (LDMS)"] {{webarchive|url=https://web.archive.org/web/20121010031040/http://www.cse.wustl.edu/~jain/cis788-99/ftp/lmds/index.html |date=2012-10-10 }}, Vinod Tipparaju, November 23, 1999</ref> Originally designed for digital television transmission (DTV), it is conceived as a fixed wireless, point-to-multipoint technology for utilization in the last mile. Data rates range from 64 kbit/s to 155 Mbit/s.<ref>[http://www.angelfire.com/nd/ramdinchacha/DEC00.html "LMDS: Broadband Out of Thin Air "] {{webarchive|url=https://web.archive.org/web/20140415040102/http://www.angelfire.com/nd/ramdinchacha/DEC00.html |date=2014-04-15 }}, Niraj K Gupta, from My Cell, Voice & Data, December 2000</ref> Distance is typically limited to about {{convert|1.5|mi|km}}, but links of up to {{convert|5|mi|km|sigfig=1}} from the base station are possible in some circumstances.<ref>[http://www.ijest.info/docs/IJEST09-01-01.pdf "Review and Analysis of Local Multipoint Distribution System (LMDS) to Deliver Voice, Data, Internet, and Video Services"], S.S. Riaz Ahamed, International Journal of Engineering Science and Technology, Vol. 1(1), October 2009, pp. 1–7</ref>

LMDS has been surpassed in both technological and commercial potential by the LTE and WiMAX standards.

===Hybrid Access Networks===
{{See also |Hybrid Access Networks}}

In some regions, notably in rural areas, the length of the copper lines makes it difficult for network operators to provide high-bandwidth services. One alternative is to combine a fixed-access network, typically [[XDSL]], with a wireless network, typically [[LTE (telecommunication)|LTE]]. The [[Broadband Forum]] has standardised an architecture for such Hybrid Access Networks.

===Non-commercial alternatives for using Internet services===
{{See also |Project Loon}}

====Grassroots wireless networking movements====
Deploying multiple adjacent Wi-Fi access points is sometimes used to create [[Municipal wireless network|city-wide]] wireless networks.<ref>{{Citation | url = http://www.wi-fi.org/discover-and-learn | title = Discover and Learn | publisher = The Wi-Fi Alliance | access-date = 6 May 2012 | url-status = dead | archive-url = https://web.archive.org/web/20120510032811/http://www.wi-fi.org/discover-and-learn | archive-date = 10 May 2012 }}</ref> It is usually ordered by the local municipality from commercial WISPs.

[[Grassroots]] efforts have also led to [[wireless community network]]s widely deployed at numerous countries, both developing and developed ones. Rural wireless-ISP installations are typically not commercial in nature and are instead a patchwork of systems built up by hobbyists mounting antennas on [[radio masts and towers]], agricultural [[storage silo]]s, very tall trees, or whatever other tall objects are available.

Where radio spectrum regulation is not community-friendly, the channels are crowded or when equipment can not be afforded by local residents, [[Free-space optical communication#LEDs|free-space optical communication]] can also be deployed in a similar manner for point to point transmission in air (rather than in fiber optic cable).

====Packet radio====
{{Main |Packet radio|AMPRNet}}

Packet radio connects computers or whole networks operated by radio amateurs with the option to access the Internet. Note that as per the regulatory rules outlined in the HAM license, Internet access and e-mail should be strictly related to the activities of hardware amateurs.

====Sneakernet====
{{Main |Sneakernet}}

The term, a [[tongue-in-cheek]] play on ''net(work)'' as in ''[[Internet]]'' or ''[[Ethernet]]'', refers to the wearing of [[sneakers (footwear)|sneakers]] as the transport mechanism for the data.

For those who do not have access to or can not afford broadband at home, downloading large files and disseminating information is done by transmission through workplace or library networks, taken home and shared with neighbors by sneakernet. The Cuban ''[[El Paquete Semanal]]'' is an organized example of this.

There are various decentralized, [[Delay-tolerant networking|delay tolerant]] peer to peer applications which aim to fully automate this using any available interface, including both wireless (Bluetooth, Wi-Fi mesh, P2P or hotspots) and physically connected ones (USB storage, Ethernet, etc.).

Sneakernets may also be used in tandem with computer network data transfer to increase data security or overall throughput for big data use cases. Innovation continues in the area to this day; for example, AWS has recently announced Snowball, and bulk data processing is also done in a similar fashion by many research institutes and government agencies.

==Pricing and spending==
[[File:Broadband Affordability.png|thumb|400px|<div style="text-align: center;">'''Broadband affordability in 2011'''</div><small>This map presents an overview of broadband affordability, as the relationship between average yearly income per capita and the cost of a broadband subscription (data referring to 2011). Source: Information Geographies at the Oxford Internet Institute.<ref name=InternetPopulation2011>[http://geography.oii.ox.ac.uk/#broadband-affordability "Broadband affordability"] {{webarchive|url=https://web.archive.org/web/20140614024048/http://geography.oii.ox.ac.uk/ |date=2014-06-14 }}, Information Geographies at the Oxford Internet Institute</ref></small>]]

Internet access is limited by the relation between pricing and available resources to spend. Regarding the latter, it is estimated that 40% of the world's population has less than US$20 per year available to spend on [[information and communications technology]] (ICT).<ref name="HilbertWD38,5">{{cite journal | doi=10.1016/j.worlddev.2009.11.019 | volume=38 | issue=5 | title=When is Cheap, Cheap Enough to Bridge the Digital Divide? Modeling Income Related Structural Challenges of Technology Diffusion in Latin America | year=2010 | journal=World Development | pages=756–770 | last1=Hilbert | first1=Martin | url=http://www.martinhilbert.net/CheapEnoughWD_Hilbert_pre-print.pdf | url-status=live | archive-url=https://web.archive.org/web/20160706014401/http://martinhilbert.net/CheapEnoughWD_Hilbert_pre-print.pdf | archive-date=2016-07-06 }}</ref> In Mexico, the poorest 30% of the society counts with an estimated US$35 per year (US$3 per month) and in Brazil, the poorest 22% of the population counts with merely US$9 per year to spend on ICT (US$0.75 per month). From Latin America it is known that the borderline between ICT as a [[necessity good]] and ICT as a [[luxury good]] is roughly around the “magical number” of US$10 per person per month, or US$120 per year.<ref name="HilbertWD38,5"/> This is the amount of ICT spending people esteem to be a basic necessity. Current Internet access prices exceed the available resources by large in many countries.

Dial-up users pay the costs for making local or long distance phone calls, usually pay a monthly subscription fee, and may be subject to additional per minute or traffic based charges, and connect time limits by their ISP. Though less common today than in the past, some dial-up access is offered for "free" in return for watching banner ads as part of the dial-up service. [[NetZero]], [[Kmart#BlueLight internet service|BlueLight]], [[Juno Online Services|Juno]], [[Freenet (ISP)|Freenet (NZ)]], and [[Free-net]]s are examples of services providing free access. Some [[Wireless community network]]s continue the tradition of providing free Internet access.

Fixed broadband Internet access is often sold under an "unlimited" or [[flat rate]] pricing model, with price determined by the maximum data rate chosen by the customer, rather than a per minute or traffic based charge. Per minute and traffic based charges and traffic caps are common for mobile broadband Internet access.

Internet services like [[Facebook]], [[Wikipedia]] and [[Google]] have built special programs to partner with [[mobile network operator]]s (MNO) to introduce ''[[zero-rating]]'' the cost for their data volumes as a means to provide their service more broadly into developing markets.<ref>{{cite web |url=https://www.newschallenge.org/challenge/2014/feedback-review/zero-rating-development-darling-or-net-neutrality-nemesis |title=Zero-rating: Development Darling or Net Neutrality Nemesis? |access-date=July 26, 2014 |last=McDiarmid |first=Andrew |publisher=Knight News Challenge |date=March 18, 2014 |url-status=dead |archive-url=https://web.archive.org/web/20140808054736/https://www.newschallenge.org/challenge/2014/feedback-review/zero-rating-development-darling-or-net-neutrality-nemesis |archive-date=August 8, 2014 }}</ref>

With increased consumer demand for streaming content such as video on demand and peer-to-peer file sharing, demand for bandwidth has increased rapidly and for some ISPs the flat rate pricing model may become unsustainable. However, with [[fixed costs]] estimated to represent 80–90% of the cost of providing broadband service, the marginal cost to carry additional traffic is low. Most ISPs do not disclose their costs, but the cost to transmit a gigabyte of data in 2011 was estimated to be about $0.03.<ref>[https://www.theglobeandmail.com/news/technology/gadgets-and-gear/hugh-thompson/what-is-a-fair-price-for-internet-service/article1890596/ "What is a fair price for Internet service?"] {{webarchive|url=https://web.archive.org/web/20120209005530/http://www.theglobeandmail.com/news/technology/gadgets-and-gear/hugh-thompson/what-is-a-fair-price-for-internet-service/article1890596/ |date=2012-02-09 }}, Hugh Thompson, ''Globe and Mail'' (Toronto), 1 February 2011</ref>

Some ISPs estimate that a small number of their users consume a disproportionate portion of the total bandwidth. In response some ISPs are considering, are experimenting with, or have implemented combinations of traffic based pricing, time of day or "peak" and "off peak" pricing, and bandwidth or traffic caps. Others claim that because the marginal cost of extra bandwidth is very small with 80 to 90 percent of the costs fixed regardless of usage level, that such steps are unnecessary or motivated by concerns other than the cost of delivering bandwidth to the end user.<ref name=Hansell-2008>{{cite news |first=Saul |last=Hansell |url=http://bits.blogs.nytimes.com/2008/01/17/time-warner-download-too-much-and-you-might-pay-30-a-movie/?ref=technology |title=Time Warner: Download Too Much and You Might Pay $30 a Movie |work=The New York Times |date=January 17, 2008 |access-date=June 6, 2009 |url-status=live |archive-url=https://web.archive.org/web/20090126061232/http://bits.blogs.nytimes.com/2008/01/17/time-warner-download-too-much-and-you-might-pay-30-a-movie/?ref=technology |archive-date=January 26, 2009 }}</ref><ref>[http://www.comparebroadband.com.au/article_64_On--and-Off-Peak-Quotas.htm "On- and Off-Peak Quotas"] {{webarchive|url=https://web.archive.org/web/20120331205209/http://www.comparebroadband.com.au/article_64_On--and-Off-Peak-Quotas.htm |date=2012-03-31 }}, Compare Broadband, 12 July 2009</ref><ref>{{cite web |first=Leslie |last=Cauley |title=Comcast opens up about how it manages traffic |url=https://abcnews.go.com/Technology/Story?id=4692338&page=1 |publisher=ABC News |date=April 20, 2008 |access-date=June 6, 2009 |url-status=live |archive-url=https://web.archive.org/web/20110215205818/https://abcnews.go.com/Technology/story?id=4692338&page=1 |archive-date=February 15, 2011 }}</ref>

In Canada, [[Rogers Hi-Speed Internet]] and [[Bell Canada]] have imposed [[bandwidth cap]]s.<ref name=Hansell-2008/> In 2008 [[Time Warner]] began experimenting with usage-based pricing in Beaumont, Texas.<ref>{{cite magazine |first=Tom |last=Lowry |title=Time Warner Cable Expands Internet Usageh Pricing |url=http://www.businessweek.com/technology/content/mar2009/tc20090331_726397.htm?campaign_id=rss_daily |magazine=BusinessWeek |date=March 31, 2009 |access-date=June 6, 2009 |url-status=live |archive-url=https://web.archive.org/web/20090524225332/http://www.businessweek.com/technology/content/mar2009/tc20090331_726397.htm?campaign_id=rss_daily |archive-date=May 24, 2009 }}</ref> In 2009 an effort by Time Warner to expand usage-based pricing into the [[Rochester, New York]] area met with public resistance, however, and was abandoned.<ref>{{cite web |first=Evan |last=Axelbank |title=Time Warner Drops Internet Plan |url=http://rochesterhomepage.net/fulltext?nxd_id=85011 |publisher=Rochester Homepage |date=April 16, 2009 |access-date=December 6, 2010 |url-status=dead |archive-url=https://web.archive.org/web/20130604031655/http://rochesterhomepage.net/fulltext?nxd_id=85011 |archive-date=June 4, 2013 }}</ref>
On August 1, 2012 in Nashville, Tennessee and on October 1, 2012 in Tucson, Arizona Comcast began tests that impose data caps on area residents. In Nashville exceeding the 300 Gbyte cap mandates a temporary purchase of 50 Gbytes of additional data.<ref>[http://www.webpronews.com/comcast-begins-capping-data-in-the-u-s-2012-09 "Comcast Begins Capping Data in the U.S."] {{webarchive|url=https://web.archive.org/web/20130313073312/http://www.webpronews.com/comcast-begins-capping-data-in-the-u-s-2012-09 |date=2013-03-13 }}, Sean Patterson, Web Pro News, 19 September 2012</ref>

==Digital divide==
[[File:InternetPenetrationWorldMap.svg|thumb|400px|<div style="text-align: center;">'''[[List of countries by number of Internet users|Internet users in 2015 as a percentage of a country's population]]'''</div><small>Source: [[International Telecommunications Union]].<ref name=ITU-IndividualsUsingTheInternet>[http://www.itu.int/en/ITU-D/Statistics/Documents/statistics/2013/Individuals_Internet_2000-2012.xls "Percentage of Individuals using the Internet 2000–2012"] {{webarchive|url=https://web.archive.org/web/20140209141641/http://www.itu.int/en/ITU-D/Statistics/Documents/statistics/2013/Individuals_Internet_2000-2012.xls |date=2014-02-09 }}, International Telecommunications Union (Geneva), June 2013, retrieved 22 June 2013</ref></small>]]

[[File:FixedBroadbandInternetPenetrationWorldMap.svg|thumb |400px |<div style="text-align: center;">'''[[List of countries by number of broadband Internet subscriptions|Fixed broadband Internet subscriptions in 2012]]<br />as a percentage of a country's population'''</div>Source: [[International Telecommunications Union]].<ref name="FixedBroadbandITUDynamic2012">[http://www.itu.int/ITU-D/ICTEYE/Reporting/DynamicReportWizard.aspx "Fixed (wired)-broadband subscriptions per 100 inhabitants 2012"] {{webarchive|url=https://web.archive.org/web/20170710054412/http://www.itu.int/ITU-D/ICTEYE/Reporting/DynamicReportWizard.aspx |date=2017-07-10 }}, Dynamic Report, ITU ITC EYE, [[International Telecommunication Union]]. Retrieved on 29 June 2013.</ref>]]

[[File:MobileBroadbandInternetPenetrationWorldMap.svg|thumb |400px |<div style="text-align: center;">'''[[List of countries by number of broadband Internet subscriptions|Mobile broadband Internet subscriptions in 2012]]<br />as a percentage of a country's population'''</div>Source: [[International Telecommunications Union]].<ref name="MobleBroadbandITUDynamic2012">[http://www.itu.int/ITU-D/ICTEYE/Reporting/DynamicReportWizard.aspx "Active mobile-broadband subscriptions per 100 inhabitants 2012"] {{webarchive|url=https://web.archive.org/web/20170710054412/http://www.itu.int/ITU-D/ICTEYE/Reporting/DynamicReportWizard.aspx |date=2017-07-10 }}, Dynamic Report, ITU ITC EYE, [[International Telecommunication Union]]. Retrieved on 29 June 2013.</ref>]]

[[File:BandwidthInequality1986-2014.jpg|thumb|400px |The digital divide measured in terms of bandwidth is not closing, but fluctuating up and down. Gini coefficients for telecommunication capacity (in kbit/s) among individuals worldwide<ref name="HilbertBitsDivide"/>]]

Despite its tremendous growth, Internet access is not distributed equally within or between countries.<ref name=ITU-ICTStats>[http://www.itu.int/ITU-D/ict/statistics/at_glance/KeyTelecom.html "Internet Users"] {{webarchive|url=https://web.archive.org/web/20130303061300/http://www.itu.int/ITU-D/ict/statistics/at_glance/KeyTelecom.html |date=2013-03-03 }}, Key ICT indicators for the ITU/BDT regions, International Telecommunications Unions (ITU), Geneva, 16 November 2011</ref><ref name=HRJ-24-1>Amir Hatem Ali, A. (2011). [http://harvardhrj.com/wp-content/uploads/2009/09/185-220.pdf "The power of social media in developing nations"] {{webarchive|url=https://web.archive.org/web/20121114083745/http://harvardhrj.com/wp-content/uploads/2009/09/185-220.pdf |date=2012-11-14 }}, ''Human Rights Journal'', Harvard Law School, Vol. 24, Issue 1 (2011), pp. 185–219</ref> The [[digital divide]] refers to “the gap between people with effective access to [[information and communications technology]] (ICT), and those with very limited or no access”. The gap between people with Internet access and those without is one of many aspects of  the digital divide.<ref name=Wattal-Jan2011>Wattal, S.; Yili Hong; Mandviwalla, M.; Jain, A., [http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5718600 "Technology Diffusion in the Society: Analyzing Digital Divide in the Context of Social Class] {{webarchive|url=https://web.archive.org/web/20130428165655/http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5718600 |date=2013-04-28 }}", ''Proceedings of the 44th Hawaii International Conference on System Sciences (HICSS)'', pp.1–10, 4–7 January 2011, {{ISBN|978-0-7695-4282-9}}</ref> Whether someone has access to the Internet can depend greatly on financial status, geographical location as well as government policies. “Low-income, rural, and minority populations have received special scrutiny as the technological "have-nots."<ref name=McCollum-Spring2011>McCollum, S., [http://www.tolerance.org/magazine/number-39-spring-2011/getting-past-digital-divide "Getting Past the 'Digital Divide'"] {{webarchive|url=https://web.archive.org/web/20111104020811/http://www.tolerance.org/magazine/number-39-spring-2011/getting-past-digital-divide |date=2011-11-04 }}, ''Teaching Tolerance'', No. 39 (Spring 2011), pp. 46–49, and ''Education Digest'', Vol. 77 No. 2 (October 2011), pp. 52–55</ref>

Government policies play a tremendous role in bringing Internet access to or limiting access for underserved groups, regions, and countries. For example, in Pakistan, which is pursuing an aggressive IT policy aimed at boosting its drive for economic modernization, the number of Internet users grew from 133,900 (0.1% of the population) in 2000 to 31 million (17.6% of the population) in 2011.<ref>[http://www.itu.int/ITU-D/ict/material/TelecomICT_Indicators_Definition_March2010_for_web.pdf Definitions of World Telecommunication/ICT Indicators, March 2010] {{webarchive|url=https://web.archive.org/web/20141220064242/http://www.itu.int/ITU-D/ict/material/TelecomICT_Indicators_Definition_March2010_for_web.pdf |date=2014-12-20 }}, [[International Telecommunication Union]], March 2010. Accessed on 21 October 2011.</ref> In [[Internet in North Korea|North Korea]] there is relatively little access to the Internet due to the governments' fear of political instability that might accompany the benefits of access to the global Internet.<ref>{{cite news | url=https://query.nytimes.com/gst/fullpage.html?res=9E0CEEDF173FF930A15753C1A9609C8B63&n=Top%2FReference%2FTimes%20Topics%2FPeople%2FK%2FKim%20Jong%20Il | work=The New York Times | title=LINK BY LINK; The Internet Black Hole That Is North Korea | first=Tom | last=Zeller Jr | date=October 23, 2006 | access-date=May 5, 2010 | url-status=live | archive-url=https://web.archive.org/web/20100612014953/http://query.nytimes.com/gst/fullpage.html?res=9E0CEEDF173FF930A15753C1A9609C8B63&n=Top%2FReference%2FTimes%20Topics%2FPeople%2FK%2FKim%20Jong%20Il | archive-date=June 12, 2010 }}</ref> The [[United States trade embargo against Cuba|U.S. trade embargo]] is a barrier limiting Internet access in [[Internet in Cuba|Cuba]].<ref name=Press-2011>[http://som.csudh.edu/fac/lpress/cuba/chapters/lpdraft2.docx ''The state of the Internet in Cuba, January 2011''] {{webarchive|url=https://web.archive.org/web/20120425143747/http://som.csudh.edu/fac/lpress/cuba/chapters/lpdraft2.docx |date=2012-04-25 }}, Larry Press, Professor of Information Systems at [[California State University]], January 2011</ref>

Access to computers is a dominant factor in determining the level of Internet access. In 2011, in developing countries, 25% of households had a computer and 20% had Internet access, while in developed countries the figures were 74% of households had a computer and 71% had Internet access.<ref name=ITU-ITCFacts/> The majority of people in developing countries do not have Internet access.[http://tech.firstpost.com/news-analysis/most-people-in-developing-countries-have-no-internet-access-facebook-256125.html] About 4 billion people do not have Internet access.[https://www.pcmag.com/article2/0,2817,2484734,00.asp] When buying computers was legalized in Cuba in 2007, the private ownership of computers soared (there were 630,000 computers available on the island in 2008, a 23% increase over 2007).<ref>[https://books.google.com/books?id=Q2qQZfkOCNsC&pg=PA114&lpg=PA114&dq=Private+ownership+of+computers+in+Cuba&source=bl&ots=bKMn5ZraA6&sig=8CcYmtODxcyXSr9LxtjatH_vkdE&hl=en&ei=ydWPTuKbLcaWtweR_qCNDA&sa=X&oi=book_result&ct=result&resnum=4&ved=0CDAQ6AEwAw#v=onepage&q=Private%20ownership%20computers&f=false "Changes in Cuba: From Fidel to Raul Castro"] {{webarchive|url=https://web.archive.org/web/20170109135109/https://books.google.com/books?id=Q2qQZfkOCNsC&pg=PA114&lpg=PA114&dq=Private+ownership+of+computers+in+Cuba&source=bl&ots=bKMn5ZraA6&sig=8CcYmtODxcyXSr9LxtjatH_vkdE&hl=en&ei=ydWPTuKbLcaWtweR_qCNDA&sa=X&oi=book_result&ct=result&resnum=4&ved=0CDAQ6AEwAw |date=2017-01-09 }}, ''Perceptions of Cuba: Canadian and American policies in comparative perspective'', Lana Wylie, University of Toronto Press Incorporated, 2010, p. 114, {{ISBN|978-1-4426-4061-0}}</ref><ref name="Cuba to keep internet limits">{{cite web |url=http://www.allbusiness.com/media-telecommunications/internet-www/11795551-1.html |title=Cuba to keep internet limits |publisher=Agence France-Presse (AFP) |date=9 February 2009 |url-status=live |archive-url=https://web.archive.org/web/20090512025828/http://www.allbusiness.com/media-telecommunications/internet-www/11795551-1.html |archive-date=12 May 2009 }}</ref>

Internet access has changed the way in which many people think and has become an integral part of people's economic, political, and social lives. The United Nations has recognized that providing Internet access to more people in the world will allow them to take advantage of the “political, social, economic, educational, and career opportunities” available over the Internet.<ref name=HRJ-24-1/> Several of the 67 principles adopted at the [[World Summit on the Information Society]] convened by the [[United Nations]] in Geneva in 2003, directly address the digital divide.<ref name=WSIS-03>[http://www.itu.int/wsis/docs/geneva/official/dop.html "Declaration of Principles"] {{webarchive|url=https://web.archive.org/web/20131015064756/http://www.itu.int/wsis/docs/geneva/official/dop.html |date=2013-10-15 }}, WSIS-03/GENEVA/DOC/4-E, World Summit on the Information Society, Geneva, 12 December 2003</ref> To promote economic development and a reduction of the [[digital divide]], [[national broadband plans from around the world|national broadband plans]] have been and are being developed to increase the availability of affordable high-speed Internet access throughout the world.

===Growth in number of users===
{{Worldwide Internet users}}
{{Internet users by region}}
{{Main|Global Internet usage}}

Access to the Internet grew from an estimated 10 million people in 1993, to almost 40 million in 1995, to 670 million in 2002, and to 2.7 billion in 2013.<ref>[http://www.itu.int/en/ITU-D/Statistics/Documents/facts/ICTFactsFigures2013-e.pdf "ITC Facts and Figures 2013"] {{webarchive|url=https://web.archive.org/web/20141230143936/http://www.itu.int/en/ITU-D/Statistics/Documents/facts/ICTFactsFigures2013-e.pdf |date=2014-12-30 }}, Brahima Sanou, Telecommunication Development Bureau, International Telecommunications Union (ITU), Geneva, February 2013. Retrieved 23 May 2015.</ref> With [[market saturation]], growth in the number of Internet users is slowing in industrialized countries, but continues in [[Asia]],<ref>[http://www.synovate.com/changeagent/index.php/site/full_story/the_lives_of_asian_youth/ "The lives of Asian youth"] {{webarchive|url=https://web.archive.org/web/20090511152234/http://www.synovate.com/changeagent/index.php/site/full_story/the_lives_of_asian_youth |date=2009-05-11 }}, Change Agent, August 2005</ref> [[Africa]], [[Latin America]], the [[Caribbean]], and the [[Middle East]].

There were roughly 0.6 billion fixed broadband subscribers and almost 1.2 billion mobile broadband subscribers in 2011.<ref>[http://gigaom.com/2010/07/09/worldwide-broadband-subscribers/ Giga.com] {{webarchive|url=https://web.archive.org/web/20170704064425/https://gigaom.com/2010/07/09/worldwide-broadband-subscribers/ |date=2017-07-04 }} Nearly Half a Billion Broadband Subscribers</ref> In developed countries people frequently use both fixed and mobile broadband networks. In developing countries mobile broadband is often the only access method available.<ref name=ITU-ITCFacts/>

===Bandwidth divide===

Traditionally the divide has been measured in terms of the existing numbers of subscriptions and digital devices ("have and have-not of subscriptions"). Recent studies have measured the digital divide not in terms of technological devices, but in terms of the existing bandwidth per individual (in kbit/s per capita).<ref name="HilbertBitsDivide">{{cite journal | url=http://escholarship.org/uc/item/2jp4w5rq | doi=10.1016/j.telpol.2016.01.006 | volume=40 | issue=6 | title=The bad news is that the digital access divide is here to stay: Domestically installed bandwidths among 172 countries for 1986–2014 | year=2016 | journal=Telecommunications Policy | pages=567–581 | last1=Hilbert | first1=Martin | url-status=live | archive-url=https://web.archive.org/web/20160604191331/http://escholarship.org/uc/item/2jp4w5rq | archive-date=2016-06-04 }}</ref><ref name="HilbertInfoInequality">{{cite journal | doi=10.1002/asi.23020 | volume=65 | issue=4 | title=Technological information inequality as an incessantly moving target: The redistribution of information and communication capacities between 1986 and 2010 | year=2013 | journal=Journal of the Association for Information Science and Technology | pages=821–835 | last1=Hilbert | first1=Martin | s2cid=15820273 | url=http://martinhilbert.net/TechInfoInequality.pdf | url-status=live | archive-url=https://web.archive.org/web/20161027053254/http://www.martinhilbert.net/TechInfoInequality.pdf | archive-date=2016-10-27 }}</ref> As shown in the Figure on the side, the digital divide in kbit/s is not monotonically decreasing, but re-opens up with each new innovation. For example, "the massive diffusion of narrow-band Internet and mobile phones during the late 1990s" increased digital inequality, as well as "the initial introduction of broadband DSL and cable modems during 2003–2004 increased levels of inequality".<ref name="HilbertInfoInequality"/> This is because a new kind of connectivity is never introduced instantaneously and uniformly to society as a whole at once, but diffuses slowly through social networks. As shown by the Figure, during the mid-2000s, communication capacity was more unequally distributed than during the late 1980s, when only fixed-line phones existed. The most recent increase in digital equality stems from the massive diffusion of the latest digital innovations (i.e. fixed and mobile broadband infrastructures, e.g. [[3G]] and fiber optics [[FTTH]]).<ref>SciDevNet (2014) How mobile phones increased the digital divide; {{cite web |url=http://www.scidev.net/global/data/scidev-net-at-large/how-mobile-phones-increased-the-digital-divide.html |title=How mobile phones increased the digital divide |access-date=2014-03-07 |url-status=live |archive-url=https://web.archive.org/web/20140307214246/http://www.scidev.net/global/data/scidev-net-at-large/how-mobile-phones-increased-the-digital-divide.html |archive-date=2014-03-07 }}</ref> As shown in the Figure, Internet access in terms of bandwidth is more unequally distributed in 2014 as it was in the mid-1990s.

===Rural access===
{{main|Broadband universal service}}

One of the great challenges for Internet access in general and for broadband access in particular is to provide service to potential customers in areas of low [[population density]], such as to farmers, ranchers, and small towns. In cities where the population density is high, it is easier for a service provider to recover equipment costs, but each rural customer may require expensive equipment to get connected. While 66% of Americans had an Internet connection in 2010, that figure was only 50% in rural areas, according to the Pew Internet & American Life Project.<ref>{{cite web |url=http://www.pewinternet.org/Reports/2010/Home-Broadband-2010/Part-1/Broadband-adoption-among-African-Americans-grew-significantly-between-2009-and-2010.aspx |title=Trends in broadband adoption |work=Home Broadband 2010 |first=Aaron |last=Scott |publisher=Pew Internet & American Life Project |date=August 11, 2011 |access-date=December 23, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111219195728/http://pewinternet.org/Reports/2010/Home-Broadband-2010/Part-1/Broadband-adoption-among-African-Americans-grew-significantly-between-2009-and-2010.aspx |archive-date=December 19, 2011 }}</ref>
[[Virgin Media]] advertised over 100 towns across the [[United Kingdom]] "from [[Cwmbran]] to [[Clydebank]]" that have access to their 100&nbsp;Mbit/s service.<ref name="100mb">{{cite web |url= http://mediacentre.virginmedia.com/Stories/Virgin-Media-s-ultrafast-100Mb-broadband-now-available-to-over-four-million-UK-homes-211c.aspx |title= Virgin Media's ultrafast 100Mb broadband now available to over four million UK homes |work= News release |publisher= Virgin Media |date= June 10, 2011 |access-date= August 18, 2011 |url-status= dead |archive-url= https://archive.today/20120710052836/http://mediacentre.virginmedia.com/Stories/Virgin-Media-s-ultrafast-100Mb-broadband-now-available-to-over-four-million-UK-homes-211c.aspx |archive-date= July 10, 2012 }}</ref>

[[Wireless Internet service provider]]s (WISPs) are rapidly becoming a popular broadband option for rural areas.<ref>[http://www.physorg.com/news71497509.html Wireless World: Wi-Fi now in rural areas] {{webarchive|url=https://web.archive.org/web/20110916103841/http://www.physorg.com/news71497509.html |date=2011-09-16 }} July 7, 2006</ref> The technology's line-of-sight requirements may hamper connectivity in some areas with hilly and heavily foliated terrain. However, the Tegola project, a successful pilot in remote Scotland, demonstrates that wireless can be a viable option.<ref>{{cite web | url=http://www.tegola.org.uk | title=Tegola project linking Skye, Knoydart and Loch Hourne | access-date=2010-03-16 | url-status=live | archive-url=https://web.archive.org/web/20121015180711/http://www.tegola.org.uk/ | archive-date=2012-10-15 }}</ref>

The [[Broadband for Rural Nova Scotia initiative]] is the first program in North America to guarantee access to "100% of civic addresses" in a region. It is based on [[Motorola Canopy]] technology. As of November 2011, under 1000 households have reported access problems. Deployment of a new cell network by one Canopy provider ([[EastLink (company)|Eastlink]]) was expected to provide the alternative of 3G/4G service, possibly at a special unmetered rate, for areas harder to serve by Canopy.<ref>[http://www.gov.ns.ca/econ/broadband/ "Broadband for Rural Nova Scotia"] {{webarchive|url=https://web.archive.org/web/20120519220248/http://www.gov.ns.ca/econ/broadband/ |date=2012-05-19 }}, Economic and Rural Development, Nova Scotia, Canada, access 27 April 2012</ref>

In New Zealand, a fund has been formed by the government to improve rural broadband,<ref>{{cite web|title=Rural Broadband Initiative 2|url=http://www.mbie.govt.nz/info-services/sectors-industries/technology-communications/fast-broadband/new-initiatives/rbi2-mbsf-policy-settings|access-date=30 April 2017|url-status=dead|archive-url=https://web.archive.org/web/20170424200803/http://www.mbie.govt.nz/info-services/sectors-industries/technology-communications/fast-broadband/new-initiatives/rbi2-mbsf-policy-settings/|archive-date=24 April 2017|df=dmy-all}}</ref> and mobile phone coverage. Current proposals include: (a) extending fibre coverage and upgrading copper to support VDSL, (b) focussing on improving the coverage of cellphone technology, or (c) regional wireless.<ref>{{cite web|title=Rural broadband extension bids: Your guide to the RBI2 runners and riders|url=https://www.geekzone.co.nz/content.asp?contentid=21425|access-date=30 April 2017|url-status=live|archive-url=https://web.archive.org/web/20170417110115/https://www.geekzone.co.nz/content.asp?contentid=21425|archive-date=17 April 2017}}</ref>

Several countries have started to [[Hybrid Access Networks]] to provide faster Internet services in rural areas by enabling network operators to efficiently combine their [[XDSL]] and [[LTE (telecommunication)|LTE]] networks.

===Access as a civil or human right===
{{Further |Digital rights|Right to Internet access}}

The actions, statements, opinions, and recommendations outlined below have led to the suggestion that Internet access itself is or should become a civil or perhaps a human right.<ref>[http://www.du.edu/gsis/hrhw/volumes/2004/best-2004.pdf "Can the Internet be a Human Right?"], Michael L. Best, ''Human rights & Human Welfare'', Vol. 4 (2004)</ref><ref>{{cite news | url=https://www.wired.com/threatlevel/2011/06/internet-a-human-right/ | work=Wired | first=David | last=Kravets | title=U.N. Report Declares Internet Access a Human Right | date=June 3, 2011 | url-status=live | archive-url=https://web.archive.org/web/20140324174702/http://www.wired.com/threatlevel/2011/06/internet-a-human-right | archive-date=March 24, 2014 }}</ref>

Several countries have adopted laws requiring the state to work to ensure that Internet access is broadly available or preventing the state from unreasonably restricting an individual's [[access to information]] and the Internet:
* [[Costa Rica]]: A 30 July 2010 ruling by the Supreme Court of Costa Rica stated: "Without fear of equivocation, it can be said that these technologies [information technology and communication] have impacted the way humans communicate, facilitating the connection between people and institutions worldwide and eliminating barriers of space and time. At this time, access to these technologies becomes a basic tool to facilitate the exercise of fundamental rights and democratic participation (e-democracy) and citizen control, education, freedom of thought and expression, access to information and public services online, the right to communicate with government electronically and administrative transparency, among others. This includes the fundamental right of access to these technologies, in particular, the right of access to the Internet or World Wide Web."<ref>[https://web.archive.org/web/20151217120514/http://200.91.68.20/pj/scij/busqueda/jurisprudencia/jur_texto_sentencia.asp?nValor2=483874&tem1=013141&param7=0&lResultado=3&nValor1=1&strTipM=T&strLib=LIB "Judgement 12790 of the Supreme Court"], File 09-013141-0007-CO, 30 July 2010. ([https://www.google.com/translate_c?langpair=en&u=http://200.91.68.20/pj/scij/busqueda/jurisprudencia/jur_texto_sentencia.asp?nValor2=483874&tem1=013141&param7=0&lResultado=3&nValor1=1&strTipM=T&strLib=LIB English translation])</ref>
* [[Estonia]]: In 2000, the parliament launched a massive program to expand access to the countryside. The Internet, the government argues, is essential for life in the twenty-first century.<ref>[http://www.csmonitor.com/2003/0701/p07s01-woeu.html "Estonia, where being wired is a human right"] {{webarchive|url=https://web.archive.org/web/20120222045554/http://www.csmonitor.com/2003/0701/p07s01-woeu.html |date=2012-02-22 }}, Colin Woodard, ''Christian Science Monitor'', 1 July 2003</ref>
* [[Finland]]: By July 2010, every person in Finland was to have access to a one-megabit per second broadband connection, according to the [[Ministry of Transport and Communications (Finland)|Ministry of Transport and Communications]]. And by 2015, access to a 100 Mbit/s connection.<ref>[http://news.cnet.com/8301-17939_109-10374831-2.html "Finland makes 1Mb broadband access a legal right"] {{webarchive|url=https://web.archive.org/web/20120729123950/http://news.cnet.com/8301-17939_109-10374831-2.html |date=2012-07-29 }}, Don Reisinger, ''CNet News'', 14 October 2009</ref>
* [[France]]: In June 2009, the [[Constitutional Council of France|Constitutional Council]], France's highest court, declared access to the Internet to be a basic human right in a strongly-worded decision that struck down portions of the [[HADOPI law]], a law that would have tracked abusers and without judicial review automatically cut off network access to those who continued to download illicit material after two warnings<ref>{{cite news | url=http://www.foxnews.com/story/0,2933,525993,00.html | work=London Times | publisher=Fox News | title=Top French Court Declares Internet Access 'Basic Human Right' | date=12 June 2009 | url-status=dead | archive-url=https://web.archive.org/web/20120107044340/http://www.foxnews.com/story/0,2933,525993,00.html | archive-date=2012-01-07 | access-date=2019-01-14 }}</ref>
* [[Greece]]: Article 5A of the [[Constitution of Greece]] states that all persons has a right to participate in the [[Information society|Information Society]] and that the state has an obligation to facilitate the production, exchange, diffusion, and access to electronically transmitted information.<ref name="gr">[http://www.hellenicparliament.gr/UserFiles/f3c70a23-7696-49db-9148-f24dce6a27c8/001-156%20aggliko.pdf ''Constitution of Greece As revised by the parliamentary resolution of May twenty-seventh 2008 of the VIIIth Revisionary Parliament''] {{webarchive|url=https://web.archive.org/web/20150705085050/http://www.hellenicparliament.gr/UserFiles/f3c70a23-7696-49db-9148-f24dce6a27c8/001-156%20aggliko.pdf |date=2015-07-05 }}, English language translation, Hellenic Parliament</ref>
* [[Spain]]: Starting in 2011, [[Telefónica]], the former state monopoly that holds the country's "[[universal service]]" contract, has to guarantee to offer "reasonably" priced broadband of at least one megabyte per second throughout Spain.<ref>{{cite news |url = https://www.reuters.com/article/idUSLH61554320091117 |title = Spain govt to guarantee legal right to broadband |author = Sarah Morris |work = Reuters |date = 17 November 2009 |url-status = live |archive-url = https://web.archive.org/web/20101225064217/http://www.reuters.com/article/idUSLH61554320091117 |archive-date = 25 December 2010 }}</ref>

In December 2003, the [[World Summit on the Information Society]] (WSIS) was convened under the auspice of the [[United Nations]]. After lengthy negotiations between governments, businesses and civil society representatives the WSIS Declaration of Principles was adopted reaffirming the importance of the Information Society to maintaining and strengthening [[human rights]]:<ref name="WSIS-03"/>
<ref name="Murray">{{Cite book| last1 = Klang| first1 = Mathias| last2 = Murray| first2 = Andrew| title = Human Rights in the Digital Age| year = 2005| url = http://www.psypress.com/9781904385318| archive-url = https://archive.today/20130131224840/http://www.psypress.com/9781904385318| url-status = dead| archive-date = 2013-01-31| publisher = Routledge| page = 1}}</ref>
:1. We, the representatives of the peoples of the world, assembled in Geneva from 10–12 December 2003 for the first phase of the World Summit on the Information Society, declare our common desire and commitment to build a people-centred, inclusive and development-oriented Information Society, where everyone can create, access, utilize and share information and knowledge, enabling individuals, communities and peoples to achieve their full potential in promoting their sustainable development and improving their quality of life, premised on the purposes and principles of the [[Charter of the United Nations]] and respecting fully and upholding the [[Universal Declaration of Human Rights]].

:3. We reaffirm the universality, indivisibility, interdependence and interrelation of all human rights and fundamental freedoms, including the [[right to development]], as enshrined in the [[Vienna Declaration]]. We also reaffirm that [[democracy]], [[sustainable development]], and respect for human rights and fundamental freedoms as well as good governance at all levels are interdependent and mutually reinforcing. We further resolve to strengthen the rule of law in international as in national affairs.

The [[World Summit on the Information Society|WSIS]] Declaration of Principles makes specific reference to the importance of the right to [[freedom of expression]] in the "[[information society|Information Society]]" in stating:
:4. We reaffirm, as an essential foundation of the [[information society|Information Society]], and as outlined in Article 19 of the [[Universal Declaration of Human Rights]], that everyone has the right to [[Freedom of speech|freedom of opinion and expression]]; that this right includes freedom to hold opinions without interference and to seek, receive and impart information and ideas through any media and regardless of frontiers. Communication is a fundamental social process, a basic human need and the foundation of all social organisation. It is central to the Information Society. Everyone, everywhere should have the opportunity to participate and no one should be excluded from the benefits of the Information Society offers."<ref name="Murray"/>

A poll of 27,973 adults in 26 countries, including 14,306 Internet users,<ref>For the BBC poll Internet users are those who used the Internet within the previous six months.</ref> conducted for the [[BBC World Service]] between 30 November 2009 and 7 February 2010 found that almost four in five Internet users and non-users around the world felt that access to the Internet was a fundamental right.<ref name=BBCPoll-2010>[http://news.bbc.co.uk/1/shared/bsp/hi/pdfs/08_03_10_BBC_internet_poll.pdf "BBC Internet Poll: Detailed Findings"] {{webarchive|url=https://web.archive.org/web/20130601163736/http://news.bbc.co.uk/1/shared/bsp/hi/pdfs/08_03_10_BBC_internet_poll.pdf |date=2013-06-01 }}, BBC World Service, 8 March 2010</ref> 50% strongly agreed, 29% somewhat agreed, 9% somewhat disagreed, 6% strongly disagreed, and 6% gave no opinion.<ref>[http://news.bbc.co.uk/2/hi/8548190.stm "Internet access is 'a fundamental right'"] {{webarchive|url=https://web.archive.org/web/20120107075123/http://news.bbc.co.uk/2/hi/8548190.stm |date=2012-01-07 }}, ''BBC News'', 8 March 2010</ref>

The 88 recommendations made by the [[United Nations Special Rapporteur|Special Rapporteur]] on the promotion and protection of the right to freedom of opinion and expression in a May 2011 report to the [[United Nations Human Rights Council|Human Rights Council]] of the [[United Nations General Assembly]] include several that bear on the question of the right to Internet access:<ref>[http://www2.ohchr.org/english/bodies/hrcouncil/docs/17session/A.HRC.17.27_en.pdf "VI. Conclusions and recommendations"] {{webarchive|url=https://web.archive.org/web/20120402152208/http://www2.ohchr.org/english/bodies/hrcouncil/docs/17session/A.HRC.17.27_en.pdf |date=2012-04-02 }}, ''Report of the Special Rapporteur on the promotion and protection of the right to freedom of opinion and expression, Frank La Rue'', Human Rights Council, Seventeenth session
Agenda item 3, United Nations General Assembly, 16 May 2011</ref>
:67. Unlike any other medium, the Internet enables individuals to seek, receive and impart information and ideas of all kinds instantaneously and inexpensively across national borders. By vastly expanding the capacity of individuals to enjoy their right to freedom of opinion and expression, which is an “enabler” of other human rights, the Internet boosts economic, social and political development, and contributes to the progress of humankind as a whole. In this regard, the Special Rapporteur encourages other Special Procedures mandate holders to engage on the issue of the Internet with respect to their particular mandates.

:78. While blocking and filtering measures deny users access to specific content on the Internet, States have also taken measures to cut off access to the Internet entirely. The Special Rapporteur considers cutting off users from Internet access, regardless of the justification provided, including on the grounds of violating intellectual property rights law, to be disproportionate and thus a violation of article 19, paragraph 3, of the International Covenant on Civil and Political Rights.

:79. The Special Rapporteur calls upon all States to ensure that Internet access is maintained at all times, including during times of political unrest.

:85. Given that the Internet has become an indispensable tool for realizing a range of human rights, combating inequality, and accelerating development and human progress, ensuring universal access to the Internet should be a priority for all States. Each State should thus develop a concrete and effective policy, in consultation with individuals from all sections of society, including the private sector and relevant Government ministries, to make the Internet widely available, accessible and affordable to all segments of population.

===Network neutrality===
{{Net neutrality}}
{{main |Net neutrality }}

Network neutrality (also net neutrality, Internet neutrality, or net equality) is the principle that Internet service providers and governments should treat all data on the Internet equally, not discriminating or charging differentially by user, content, site, platform, application, type of attached equipment, or mode of communication.<ref>{{cite web|url=http://www.jthtl.org/content/articles/V2I1/JTHTLv2i1_Wu.PDF|title=Network Neutrality, Broadband Discrimination|publisher=Journal on telecom and high tech law|author=Tim Wu|year=2003|access-date=23 Apr 2014|url-status=live|archive-url=https://web.archive.org/web/20140424062409/http://www.jthtl.org/content/articles/V2I1/JTHTLv2i1_Wu.PDF|archive-date=2014-04-24}}</ref><ref name=kraemer-def>{{cite journal | last1 = Krämer | first1 = J | last2 = Wiewiorra | first2 = L. | last3 = Weinhardt | first3 = C. | year = 2013 | title = Net Neutrality: A progress report | url = http://www.im.uni-karlsruhe.de/Upload/Publications/336c39b3-7a62-4159-bb1a-483f39dd5b24.pdf | journal = Telecommunications Policy | volume = 37 | issue = 9 | pages = 794–813 | doi = 10.1016/j.telpol.2012.08.005 | url-status = dead | archive-url = https://web.archive.org/web/20150924033749/http://www.im.uni-karlsruhe.de/Upload/Publications/336c39b3-7a62-4159-bb1a-483f39dd5b24.pdf | archive-date = 2015-09-24 | citeseerx = 10.1.1.258.5878 }}</ref><ref name="berners-lee-def">{{cite web |url=http://dig.csail.mit.edu/breadcrumbs/node/144 |title=Net Neutrality: This is serious |access-date=26 December 2008 |last=Berners-Lee |first=Tim |author-link=Tim Berners-Lee |date=21 June 2006 |work=timbl's blog |url-status=dead |archive-url=https://web.archive.org/web/20081227100511/http://dig.csail.mit.edu/breadcrumbs/node/144 |archive-date=27 December 2008 }}</ref><ref name="nn-for-google-users">{{cite web |author=Staff |url= https://www.google.com/help/netneutrality.html |title=A Guide to Net Neutrality for Google Users |access-date=7 December 2008 |url-status=dead |archive-date=1 September 2008 |archive-url=https://web.archive.org/web/20080901084929/https://www.google.com/help/netneutrality.html }}</ref> Advocates of net neutrality have raised concerns about the ability of broadband providers to use their [[last mile]] infrastructure to block Internet applications and content (e.g. websites, services, and protocols), and even to block out competitors.<ref>Lessig, L. 1999. [http://cyber.law.harvard.edu/works/lessig/www9.pdf Cyberspace’s Architectural Constitution] {{webarchive|url=https://web.archive.org/web/20141225183518/http://cyber.law.harvard.edu/works/lessig/www9.pdf |date=2014-12-25 }}, draft 1.1, Text of lecture given at www9, Amsterdam, Netherlands</ref> Opponents claim net neutrality regulations would deter investment into improving broadband infrastructure and try to fix something that isn't broken.<ref name="tiaonline.org">[http://www.tiaonline.org/sites/default/files/pages/Internet_ecosystem_letter_FINAL_12.10.14.pdf "Letter to FCC commissioners and U.S. Senate and Congressional leaders expressing strong opposition to proposals to classify broadband as a 'Title II' service from a wide range of technology companies"] {{webarchive|url=https://web.archive.org/web/20150216163709/http://www.tiaonline.org/sites/default/files/pages/Internet_ecosystem_letter_FINAL_12.10.14.pdf |date=2015-02-16 }}, 10 December 2014. Retrieved 23 May 2015.</ref><ref name="chicagotribune.com">{{cite web|url=http://www.chicagotribune.com/news/opinion/commentary/ct-internet-regulations-fcc-ftc-obama-broadband-perspec-0219-20150218-story.html|title=The Internet isn't broken. Obama doesn't need to 'fix' it.|author=Chicago Tribune|date=18 February 2015|work=chicagotribune.com|url-status=live|archive-url=https://web.archive.org/web/20150226173240/http://www.chicagotribune.com/news/opinion/commentary/ct-internet-regulations-fcc-ftc-obama-broadband-perspec-0219-20150218-story.html|archive-date=26 February 2015}}</ref> In April 2017, a recent attempt to compromise [[net neutrality in the United States]] is being considered by the newly appointed FCC chairman, [[Ajit Varadaraj Pai]].<ref name="NYT-20170429">{{cite news |author=The Editorial Board |title=F.C.C. Invokes Internet Freedom While Trying to Kill It |url=https://www.nytimes.com/2017/04/29/opinion/sunday/fcc-invokes-internet-freedom-while-trying-to-kill-it.html |date=29 April 2017 |work=[[New York Times]] |access-date=30 April 2017 |url-status=live |archive-url=https://web.archive.org/web/20170429184910/https://www.nytimes.com/2017/04/29/opinion/sunday/fcc-invokes-internet-freedom-while-trying-to-kill-it.html |archive-date=29 April 2017 }}</ref> The vote on whether or not to abolish net neutrality was passed on December 14, 2017, and ended in a 3–2 split in favor of abolishing net neutrality.

==Natural disasters and access==

Natural disasters disrupt internet access in profound ways. This is important—not only for telecommunication companies who own the networks and the businesses who use them, but for emergency crew and displaced citizens as well. The situation is worsened when hospitals or other buildings necessary to disaster response lose their connection. Knowledge gained from studying past internet disruptions by natural disasters could be put to use in planning or recovery. Additionally, because of both natural and man-made disasters, studies in network resiliency are now being conducted to prevent large-scale outages.<ref name="omer">[http://www.stevens-tech.edu/csr/fileadmin/csr/Publications/Omer_Measuring_the_Resilience_of_the_Global_Internet__Infrastructure.pdf Measuring the Resilience of the Global Internet Infrastructure System]{{dead link|date=November 2017 |bot=InternetArchiveBot |fix-attempted=yes }}, 2009 3rd Annual IEEE Systems Conference, 156–162.</ref>

One way natural disasters impact internet connection is by damaging end sub-networks (subnets), making them unreachable. A study on local networks after [[Hurricane Katrina]] found that 26% of subnets within the storm coverage were unreachable.<ref name="Erjongmanee">[http://users.ece.gatech.edu/~jic/katrina.pdf Inference of Network-Service Disruption upon Natural Disasters] {{webarchive|url=https://web.archive.org/web/20130523173124/http://users.ece.gatech.edu/~jic/katrina.pdf |date=2013-05-23 }}, accessed 5 December 2012.</ref> At Hurricane Katrina's peak intensity, almost 35% of networks in Mississippi were without power, while around 14% of Louisiana's networks were disrupted.<ref name="Katrina">[http://www.renesys.com/tech/presentations/pdf/Renesys-Katrina-Report-9sep2005.pdf Impact of Hurricane Katrina on Internet Infrastructure] {{webarchive|url=https://web.archive.org/web/20121115094240/http://www.renesys.com/tech/presentations/pdf/Renesys-Katrina-Report-9sep2005.pdf |date=2012-11-15 }}, Renesys Report, 9 September 2005, accessed 5 December 2012.</ref> Of those unreachable subnets, 73% were disrupted for four weeks or longer and 57% were at “network edges where important emergency organizations such as hospitals and government agencies are mostly located”.<ref name="Erjongmanee" /> Extensive infrastructure damage and inaccessible areas were two explanations for the long delay in returning service.<ref name="Erjongmanee" /> The company Cisco has revealed a Network Emergency Response Vehicle (NERV), a truck that makes portable communications possible for emergency responders despite traditional networks being disrupted.<ref name="NERV">[http://abclocal.go.com/kgo/story?section=news/business&id=8867345 Cisco trucks help restore internet after disasters] {{webarchive|url=https://web.archive.org/web/20130303132941/http://abclocal.go.com/kgo/story?section=news%2Fbusiness&id=8867345 |date=2013-03-03 }}, ABC News report, 30 October 2012, accessed 5 December 2012.</ref>

A second way natural disasters destroy internet connectivity is by severing submarine cables—fiber-optic cables placed on the ocean floor that provide international internet connection. A [[2006 Hengchun earthquakes|sequence of undersea earthquakes]] cut six out of seven international cables connected to [[Taiwan]] and caused a tsunami that wiped out one of its cable and landing stations.<ref name="telkom">[http://www.telkom.co.id/media-corner/press-release/taiwan-s-earthquake-and-tsunami-caused-internet-access-s-interference.html Taiwan’s Earthquake and Tsunami Caused Internet access’s Interference] {{webarchive|url=https://web.archive.org/web/20130605104155/http://www.telkom.co.id/media-corner/press-release/taiwan-s-earthquake-and-tsunami-caused-internet-access-s-interference.html |date=2013-06-05 }}, Telkom Indonesia Press Release, 27 December 2006, accessed 5 December 2012.</ref><ref name="HKUST">[http://www.ust.hk/itsc/channel/2007feb/earthquake.html Impact of Taiwan Earthquake on Internet Access] {{webarchive|url=https://web.archive.org/web/20081228000932/http://www.ust.hk/itsc/channel/2007feb/earthquake.html |date=2008-12-28 }}, Choy, C. (2007). ''Channel'', The Hong Kong University of Science & Technology, 46. Accessed 5 December 2012.</ref>  The impact slowed or disabled internet connection for five days within the Asia-Pacific region as well as between the region and the United States and Europe.<ref name="Noblis">[http://www.noblis.org/NewsPublications/Publications/TechnicalPublications/SigmaJournal/Documents/Sigma_RE_UnderstandingAndMitigating.pdf Understanding and Mitigating Catastrophic Disruption and Attack] {{webarchive|url=https://web.archive.org/web/20130202174430/http://www.noblis.org/NewsPublications/Publications/TechnicalPublications/SigmaJournal/Documents/Sigma_RE_UnderstandingAndMitigating.pdf |date=2013-02-02 }}, Masi, D., Smith E., Fischer M. ''Telecommunications and Cybersecurity'', Noblis. Accessed 5 December 2012.</ref>

With the rise in popularity of [[cloud computing]], concern has grown over access to cloud-hosted data in the event of a natural disaster. Amazon Web Services (AWS) has been in the news for major network outages in April 2011 and June 2012.<ref name="AWS2011">[http://aws.amazon.com/message/65648/ Summary of the Amazon EC2 and Amazon RDS Service Disruption in the US East Region] {{webarchive|url=https://web.archive.org/web/20130907143711/https://aws.amazon.com/message/65648/ |date=2013-09-07 }}, AWS message, 29 April 2011, accessed 5 December 2012.</ref><ref name="AWS2012">[https://aws.amazon.com/message/67457/ Summary of the AWS Service Event in the US East Region] {{webarchive|url=https://web.archive.org/web/20130724051708/http://aws.amazon.com/message/67457/ |date=2013-07-24 }}, AWS message, 2 July 2012, accessed 5 December 2012.</ref> AWS, like other major cloud hosting companies, prepares for typical outages and large-scale natural disasters with backup power as well as backup data centers in other locations. AWS divides the globe into five regions and then splits each region into availability zones. A data center in one availability zone should be backed up by a data center in a different availability zone. Theoretically, a natural disaster would not affect more than one availability zone.<ref name="justinsb">[http://justinsb.posterous.com/aws-down-why-the-sky-is-falling AWS is down: Why the sky is falling] {{webarchive|url=https://web.archive.org/web/20121223213308/http://justinsb.posterous.com/aws-down-why-the-sky-is-falling |date=2012-12-23 }}, justinsb's posterous, 21 April 2011, accessed 5 December 2012.</ref> This theory plays out as long as human error is not added to the mix. The June 2012 major storm only disabled the primary data center, but human error disabled the secondary and tertiary backups, affecting companies such as Netflix, Pinterest, Reddit, and Instagram.<ref name="cloud">[http://cloud-computing-today.com/2012/06/18/amazon-web-services-june-2012-outage-explained/ Amazon Web Services June 2012 Outage Explained] {{webarchive|url=https://web.archive.org/web/20120718022121/http://cloud-computing-today.com/2012/06/18/amazon-web-services-june-2012-outage-explained/ |date=2012-07-18 }}, Cloud Computing Today, 18 June 2012, accessed 5 December 2012.</ref><ref name="crashcloud">[http://crashcloud.com/will-natural-disasters-kill-cloud/ Will Natural Disasters Kill the Cloud?], CrashCloud, 21 August 2012, accessed 5 December 2012.</ref>

==See also==
{{div col|colwidth=20em}}
* [[Return channel|Back-channel]], a low bandwidth, or less-than-optimal, transmission channel in the opposite direction to the main channel
* [[Broadband mapping in the United States]]
* [[Comparison of wireless data standards]]
* [[Connectivity (media)|Connectivity]] in a social and cultural sense
* [[Fiber-optic communication]]
* [[History of the Internet]]
* [[IP over DVB]], Internet access using [[MPEG]] data streams over a digital television network
* [[List of countries by number of broadband Internet subscriptions]]
* [[National broadband plan]]
* [[Public switched telephone network]] (PSTN)
* [[Residential gateway]]
* [[Telecommunications network]]
* [[White spaces (radio)]], a group of technology companies working to deliver broadband Internet access via unused analog television frequencies
{{div col end}}

==References==
{{reflist |30em}}

== External links ==
{{Wikibooks|Internet}}
{{Wikivoyage|Internet access}}
* [http://ec.europa.eu/information_society/eeurope/i2010/digital_divide/index_en.htm#European_broadband_portal European broadband]
* [http://www.alternet.org/story/22216/ Corporate vs. Community Internet], [[AlterNet]], June 14, 2005, – on the clash between US cities' attempts to expand [[municipal broadband]] and corporate attempts to defend their markets
* [https://www.google.com/publicdata/directory#!q=broadband Broadband data], from Google public data
* [https://broadbandmap.fcc.gov/#/ FCC Broadband Map]
* [http://www.broadband.gov/broadband_types.html Types of Broadband Connections], Broadband.gov

{{Clear}}

{{Internet Access}}
{{Africa topic|Internet in}}
{{Americas topic|Internet in}}
{{Asia topic|Internet in}}
{{Internet in Europe}}
{{Oceania topic|Internet in}}
{{Mobile telecommunications standards}}
{{Telecommunications}}

[[Category:Internet access| ]]
[[Category:Broadband]]
[[Category:Human rights by issue]]
[[Category:Rights]]