Chapter 8. WI-FI NETWORKS
Wi-Fi (short for Wireless Fidelity, pronounced "why-fie") networks use radio signals instead of Ethernet cables to connect computers and other devices to a LAN. Wi-Fi is a convenient alternative to conventional wired networks because any wireless-enabled computer within range of the Wi-Fi signal can join the network; there's no need to find a network outlet. This can be particularly useful when it's not practical to pull data cables through walls, ceilings, and floors, and when a user wants to connect a laptop computer or a handheld device such as an iPhone or BlackBerry to an existing network or through a LAN to the Internet. And of course, thousands of Wi-Fi hotspots in public spaces such as airports, coffee shops, ...
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