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Introduction Wireless networks have increased in popularity. This is largely because of the increase in the value of a community as more users are attached to it. The value added to a community by nature of connecting more devices for it, is summarized in 'Metcalf's law' Metcalf's law states that if you 'connect any amount, 'n, '' of machines - if computers, telephones or even automobiles - and you get 'n' squared potential price.'  The incredible rise of the web seems to confirm Metcalf's law. It then seems reasonable that eliminating physical constraints to connecting to a network would offer value by allowing more devices to be connected to a network regardless of physical location. Wireless systems provide that ability. Wireless networks operate over the entire spectrum of community topographies. These topographies include: Personal, Local, Controller, Metropolitan, and Wide area networks. A Personal Area Network (PAN) is ?? The interconnection of information technology devices within the selection of an individual person, typically within a selection of 10 meters. ?  A Local Area Network (LAN) is ?? A group of computers and associated devices that share a common communications line or wireless link and typically share the resources of a single processor or server within a tiny geographic area (by way of example, within an office building). ?  A Campus Area Network (CAN) is a fiber-optic network that physically interconnects entire buildings into one giant network. While each building might have a lot of discrete LANs within it, each building represents a single node on the CAN.  A Metropolitan Area Network (MAN) is ? a network that interconnects users with computer resources in a geographic area or region larger than that covered by even a large [LAN] but smaller than the area covered by a wide area network (WAN [- explained next]). ?  A Wide Area Network (WAN) is ? a geographically dispersed telecommunications network. ?  Wireless networks are available in many configurations and utilize many technologies. Figure 1 depicts an example of the wireless technologies and standards used for each of the networks types defined above. The figure indicates two major classes of wireless technologies: fixed and mobile. The figure also indicates 10 technologies in use: Bluetooth, irDA, 802.11, IR LAN, IR Bridge, Ricochet, RF Bridge, Cellular, MCS and Satellite. Virtually all of these tec...