CHAPTER TWO
2 A BRIEF REVIEW OF WIRELESS LOCAL AREA
NETWORK (WLAN)
2.0 INTRODUCTION
Wireless local area networks (WLANs) are the same as the traditional LAN but they have a wireless interface, thereby providing location-independent network access. It enables a local network of computers to exchange data or other information by radio waves and without the use of cables. It can either replace or, more usually, extend a wired LAN. Today, wireless LANs have occupied a significant segment in the local area network market. Increasingly, organizations have found that wireless LANs are indispensable attachment to traditional wired LANs, to satisfy the requirements for mobility, relocation, ad hoc networking, and coverage of locations difficult to wire. This chapter provides a brief survey of wireless LANs. The following subtopics were covered basic WLAN components, WLAN transmission technology, WLAN spectrum allocation, WLAN topologies and WLAN applications.
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