Wireless Local Area Networks (WLAN) is a very convenient data transmission system, which utilizes radio frequency (Radio Frequency; RF) technology, replacing the old style of obstruction of the twin-twisted copper wire (Coaxial) constitute a local area network, making the wireless local area network can use simple access structure to allow users to achieve the "Coaxial" through the network, the user can use the simple access structure to let the user to achieve the "WLAN". Coaxial) local area network, so that the wireless local area network can make use of simple access to the structure allows users to through it, to achieve "information on the go, the convenience of the world's" ideal world.