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Beginner's Corner: Wireless LAN

Posted: 01 Sep 2007     Print Version  Bookmark and Share

Keywords:WLAN  802.11r  802.11n  wireless LAN 

Wireless technology has ushered in a revolution of "tetherless connection." Infrared, Bluetooth, wireless LAN, ultra-wideband, WiMax, third-generation (3G) cellular—all are contributing to this movement. In essence, WLAN is a flexible data communication system implemented as a wireless incarnation of wired-LAN. WLAN started its journey with an objective of providing connectivity to a relatively small set of users (up to a hundred) who are located within a maximum range of 100m.

WLAN is witnessing widespread deployment with varieties of cost-effective, interoperable products. WLAN consists of a few access points (APs) that communicate to terminal-equipment over an air interface using RF. The APs are generally connected to a hub, which may route the traffic to internet. Deploying a single AP for one or two users in a home or small office environment is relatively simple. But what about developing a WLAN system for a much larger space, where users are roaming, multiple APs provide adequate coverage and security is a big concern?

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