ITM 301 Lecture Notes - Lecture 10: Public Switched Telephone Network, Virtual Circuit, Passive Optical Network
10 Dec 2016
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Document Summary
A wan traverses a significant distance and usually connects lans. Each of the following scenarios demonstrates a need for a wan: A bank with offices around the state needs to connect those offices to gather transaction and account information into a central database. A clothing manufacturer sells its products over the internet to customers throughout the world. Wan link is a connection between one wan site (or endpoint) and another site (or endpoint). Resemble lan topologies, but their details differ because of the distance they must cover, the larger number of users they serve, and the heavy traffic they often handle. A wan in which each site is directly connected to no more than two other sites in a serial fashion is known as a bus topology wan. Lans use computers with shared access to one cable, whereas the wan bus topology connects different locations through point-to-point links.
