A fundamental challenge facing infotmation technology(IT) decision makers is identifying and Implementing architectures, technologies, and processes that reduce the total cost of ownership(TCO) of corparate networks- one way is the wireless LAN. Wireless LAN has become a possible replacement for the wired infrastructure, at the same time it is a significant complement to what currently exist. Schools, manufacturers, hospitals, and offices purchase wireless LAN. For they are seeking an increase in user productivity and IT team productivity. Companies that integrate or upgrade with these systems will stretch IT resources further, and be able to reap economic and business benefits sooner than companies taking a wait-and-see approach- especially now that a solid Global Standard exists for wireless local area networking. As a result of this standard and higher performing or higher speed systems, all enterprises cannot help but have a mix of wireless and wired LAN systems for data, voice and video.