Network And Internet Connections
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Network And Internet Connections
The Internet is a network of networks that interconnects computers around the
world, supporting both business and residential users. In 1994, a multimedia
Internet application known as the World Wide Web became popular. The higher
bandwidth needs of this application have highlighted the limited Internet access
speeds available to residential users. Even at 28.8 Kilobits per second
(Kbps)—the fastest residential access commonly available at the time of this
writing—the transfer of graphical images can be frustratingly slow. This
report examines two enhancements to existing residential communications
infrastructure: Integrated Services Digital Network (ISDN), and cable television
networks upgraded to pass bi-directional digital traffic (Cable Modems). It
analyzes the potential of each enhancement to deliver Internet access to
residential users. It validates the hypothesis that upgraded cable networks can
deliver residential Internet access more cost-effectively, while offering a
broader range of services. The research for this report consisted of case
studies of two commercial deployments of residential Internet access, each
introduced in the spring of 1994: · Continental Cablevision and Performance
Systems International (PSI) jointly developed PSICable, an Internet access
service deployed over upgraded cable plant in Cambridge, Massachusetts; ·
Internex, Inc. began selling Internet access over ISDN telephone circuits
available from Pacific Bell. Internex's customers are residences and small
businesses in the "Silicon Valley" area south of San Francisco,
California. 2.0 The Internet When a home is connected to the Internet,
residential communications infrastructure serves as the "last mile" of
the connection between the home computer and the rest of the computers on the
Internet. This section describes the Internet technology involved in that
connection. This section does not discuss other aspects of Internet technology
in detail; that is well done elsewhere. Rather, it focuses on the services that
need to be provided for home computer users to connect to the Internet. 2.1 ISDN
and upgraded cable networks will each provide different functionality (e.g. type
and speed of access) and cost profiles for Internet connections. It might seem
simple enough to figure out which option can provide the needed level of service
for the least cost, and declare that option "better." A key problem
with this approach is that it is difficult ...
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