Wireless local area network or WLAN

Wireless local area network or WLAN is a wireless local area network that uses radio waves as a medium tranmisinya: The last link is wireless, to provide a network connection to all users in the surrounding area. Area can be located from a single room to the entire campus. The backbone network usually uses kable, with one or more network access points connect wireless users to a wired network.

Wireless LAN is a wireless network that uses radio frequency for communication between computers and finally the access point that is the basis of two-way radio transiver typically work in the bandwidth 2.4 GHz (802.11b, 802.11g) or 5 GHz (802.11a) . Most equipment has the qualifications Wi-Fi, IEEE 802.11b or IEEE 802.11g accommodation and offers several levels of security such as WEP or WPA and.

Source : http://id.wikipedia.org/wiki/Wireless_LAN

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