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What
is the internet?
The Internet is a loose association of thousands of networks and
millions of computers across the world that all work together to
share information.
On
the Net, the main lines carry the bulk of the traffic and are collectively
known as the Internet backbone. The backbone is formed by the biggest
networks in the system, owned by major Internet service providers
(ISP) such as GTE, MCI, Sprint, UUNet, and America Online's ANS.
By
connecting to each other, these networks create a superfast pipeline
that criscrosses the United States and extends to Europe, Japan,
mainland Asia and the rest of the world. But that doesn't mean that
the network is equally well developed at every point along the route.
The U.S. backbone has so many intersecting points that if one part
fails or slows down, data can be quickly rerouted over another part,
a feature called redundancy.
In
the United States, there are five points - located in San Francisco,
San Jose, Chicago, New York and Washington D.C. - where the main
lines intersect, kind of like the airport hub cities. These main
lines use high-speed networking equipment to connect the backbone
to other networks. These networks are owned by smaller regional
and local ISPs, which in turn lease access to companies and individuals
in the areas they serve.
Government
agencies and universities are also actively involved in running
the parts of the Internet that link to supercomputer centers devoted
to the research and education communities. With help from these
communities, as well as financial support from the private sector,
Congress has been actively planning the Next Generation Internet.
This
Internet II, as it's sometimes referred to, will not replace the
existing Net - rather it will form a second backbone for government
and academic agencies to share information without getting caught
in commercial traffic.
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