There have been many analyses of the Internet and its structure. For example, it has been determined that both the Internet IP routing structure and hypertext links of the World Wide Web are examples of scale-free networks.
Similar to the way the commercial Internet providers connect via Internet exchange points, research networks tend to interconnect into large subnetworks such as the following:
* GEANT
* GLORIAD
* The Internet2 Network (formally known as the Abilene Network)
* JANET (the UK's national research and education network)
These in turn are built around relatively smaller networks. See also the list of academic computer network organizations.
Computer network diagrams often represent the Internet using a cloud symbol from which network communications pass in and out.
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