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Scalable VoIP Mobility by Joseph Epstein

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5.2. The Basics of Wi-Fi
Wireline technologies are almost entirely focused on the notion of the cable. On one end lies the network, and on the other lies the client device. Starting with the original wireless telephone system, where everything—including identity—is determined merely by which port the cable connects to, the wireline technologies have only partially moved towards mobility and the concepts of link independence.
However, Wi-Fi has no cables to begin with, and so something else is needed to define the relationship between a client and the network. Wi-Fi is built upon the notion of two types of wireless devices: the access point and the client. Both use the same types of radios, but take on different roles.
5.2.1. Access Points
The access ...

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