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Computer Networks<br />
Now-a-days no computer has an isolated existence<br />
Computers in an organization are interconnected by local area<br />
networks (LAN)<br />
Home computers are connected to Public Switched Telephone<br />
Network (PSTN) which provide a connection to an Internet<br />
Service Provider (ISP)<br />
LANs of organizations connected to LANs of other<br />
organizations via PSTN using routers<br />
V.Rajaraman SAD/M<strong>11</strong>/LU1/V1/2004<br />
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