This is the first 1,000 characters of 1377 words (5.51 pages) in the essay titled Networks
Wireless Local Area Networks
A wireless local area network (LAN) is a flexible data communications system implemented as an extension to, or as an alternative for, a wired LAN. It uses radio frequency (RF) technology, to transmit and receive data over the air, minimizing the need for wired connections. A wireless LAN system can combine data connectivity with user mobility.
The data to be transmitted is modulated onto the radio waves, called carriers, and then are removed from the carriers at the other end by what is called a transceiver. End users in a wireless local area network access the network through adapters such as PC cards in laptop notebook computers. And PCI cards in desktop computers.
These cards provide the interface linking the network operating system (NOS) and the airwaves by means of an antenna. The wireless connection is clear to the network operating system as well as to those using the network, and it supports applications such as el...
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