Computer Networking and Management Lesson 1



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Computer Networks and Internet - Overview
Things to Remember: How to connect end systems to edge router l
Residential access nets l
Institutional access networks (school, company) l
Mobile access networks
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Residential Access Networks

A residential access network connects a home end system (typically a PC, but perhaps a Web TV or other residential system) to an edge router. Probably the most common form of home access is by use of a modem over a POTS (Plain Old Telephone System) dialup line to an Internet Service Provider (ISP. The home modem converts the digital output of the PC into analogue format for transmission over the analogue phone line. A modem in the ISP converts the analogue signal back into digital form for input to the ISP router. In this case, the access network is simply a point-to -point dialup link into an edge router. The point-to -point link is your ordinary twisted-pair phone line.
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