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{{Short description|Collecting network paths}}
[[File:Internet map 1024.jpg|thumbnail|Internet Map]]

The '''Internet Mapping Project'''<ref>{{Cite journal |last=Cheswick |first=W. |author2=Burch, H. |title=Mapping the Internet |journal=IEEE Computer |date=April 1999 |volume = 32| issue =  4}}</ref><ref>{{Cite journal |last=Cheswick |first=Bill |author2=Burch, Hal |author3=Branigan, Steve |title=Mapping and Visualizing the Internet |journal=Proceedings of the Usenix Annual Technical Conference, 2000. |year=2000 |url=http://www.usenix.com/publications/library/proceedings/usenix2000/general/full_papers/cheswick/cheswick.pdf |access-date=2007-11-30 |archive-url=https://web.archive.org/web/20120206062147/http://www.usenix.com/publications/library/proceedings/usenix2000/general/full_papers/cheswick/cheswick.pdf |archive-date=2012-02-06 |url-status=dead }}</ref>
was started by William Cheswick and Hal Burch at [[Organization:Bell Labs|Bell Labs]] in 1997.  It  has collected and preserved traceroute-style paths to some hundreds of thousands of networks almost daily since 1998.  The project included visualization of the Internet data, and the Internet maps were widely disseminated.

The technology is now used by Lumeta, a spinoff of [[Organization:Bell Labs|Bell Labs]], to map corporate and government networks.  
Although Cheswick left Lumeta in September 2006, Lumeta continues to map both the [[IPv4]] and [[IPv6]] Internet. The data allows for both a snapshot and view over time of the routed infrastructure of a particular geographical area, company, organization, etc.<ref>{{cite web|url=http://www.lumeta.com/company/mapping.html|title=Home - Lumeta|publisher=|accessdate=30 August 2016|archive-url=https://web.archive.org/web/20140203184609/http://www.lumeta.com/company/mapping.html|archive-date=3 February 2014|url-status=dead}}</ref>
Cheswick continues to collect and preserve the data, and it is available for research purposes. According to Cheswick, a main goal of the project was to collect the data over time, and make a time-lapse movie of the growth of the Internet.<ref>Cheswick, William. [http://www.cheswick.com/ches/map/ "The Internet Mapping project"]</ref>

== Techniques ==
The techniques available for network discovery rely on hop-limited probes of the type used by the [[Software:Unix|Unix]] [[Software:Traceroute|traceroute]] utility or the [[Software:Windows|Windows]] NT tracert.exe tool. A Traceroute-style network probe follows the path that [[Network packet|network packet]]s take from a source [[Node (networking)|node]] to a destination [[Node (networking)|node]]. This technique uses [[Internet Protocol]] packets with an 8-bit [[Time to live|time to live]] (TTL) header field. As a packet passes through routers on the Internet, each router decreases the TTL value by one until it reaches zero. When a router receives a packet with a TTL value of zero, it drops the packet instead of forwarding it. At this point, it sends an [[Internet Control Message Protocol]] (ICMP) error message to the source node where the packet originated indicating that the packet exceeded its maximum transit time.<ref>[http://www2.ensc.sfu.ca/~ljilja/papers/nafips2001.pdf "Mapping the Internet"]</ref>

'''Active Probing''' – Active probing is a series of probes set out through a network to obtain data. Active probing is used in internet mapping to discover the topology of the Internet. Topology maps of the Internet are an important tool for characterizing the infrastructure and understanding the properties, behavior and evolution of the Internet.<ref>I.B.M. T.J. Watson Research [https://www.researchgate.net/publication/228965212_Active_probing/file/9fcfd50bf5cc129dc1.pdf Active Probing]</ref>

== Other internet mapping projects ==
* Hand Drawn Maps of Internet from 1973.<ref>{{cite tweet|user=workergnome|author=David Newbury|number=807704855276122114|date=10 December 2016|title=Going through old papers my dad gave me, I found his map of the internet as of May 1973.   The entire internet.}}</ref>
*The Center for Applied Internet Data Analysis (CAIDA) collects, monitors, analyzes, and maps several forms of Internet traffic data concerning [[Network topology|network topology]]. Their "Internet Topology Maps also referred to as AS-level Internet Graphs [are being generated] in order to visualize the shifting topology of the Internet over time."<ref>{{Cite web|title=IPv4 and IPv6 AS Core: Visualizing IPv4 and IPv6 Internet Topology at a Macroscopic Scale|url=https://www.caida.org/projects/cartography/as-core/|access-date=2021-11-12|website=CAIDA|date=26 February 2008 |language=en}}</ref>
*The [[Opte Project]], started in 2003 by engineer Barrett Lyon, using traceroute and [[Border Gateway Protocol|BGP]] routes for mapping.
* New Hampshire Project – In 2010, the U.S. Department of Commerce has awarded the University of New Hampshire's Geographically Referenced Analysis and Information Transfer (NH GRANIT) project approximately $1.7 million to manage a program that will inventory and map current and planned broadband coverage available to the state's businesses, educators, and citizens. As a part of this project, The New Hampshire Broadband Mapping Program (NHBMP) was created as a coordinated, multi-agency initiative funded by the American Recovery and Reinvestment Act through the National Telecommunications and Information Administration (NTIA), and is part of a national effort to expand high-speed Internet access and adoption through improved data collection and broadband planning.<ref>{{cite web|url=http://www.eos.unh.edu/news/indiv_news.shtml?NEWS_ID=1152|archive-url=https://archive.today/20140218000145/http://www.eos.unh.edu/news/indiv_news.shtml?NEWS_ID=1152|url-status=dead|archive-date=18 February 2014|title=UNH-EOS Individual News|publisher=|accessdate=30 August 2016}}</ref>
* In 2015, [[Biography:Kevin Kelly (editor)|Kevin Kelly (editor)]], cofounder of Wired Magazine, started his own Internet Mapping Project to understand how people conceive the internet. He wanted to discover the maps that people have in their mind as they navigate the vast internet by having them submit hand drawn pictures. So far, he has collected close to 80 submissions by people of all ages, nationalities and expertise levels, ranging from the concrete to the conceptual to the comic.<ref>Popova, Maria. [http://www.brainpickings.org/index.php/2009/06/08/internet-mapping-project/ "Ordering the Chaos: The Internet Mapping Project"]</ref><ref>Kelly, Kevin. [http://kk.org/ct2/2009/06/the-internet-mapping-project.php "The Internet Mapping Project"]</ref>

== See also ==
*[[Network mapping]]
*[[Route analytics]]

==References==
{{reflist}}

[[Category:Internet architecture]]

{{Sourceattribution|Internet Mapping Project}}