With an explosive increase of internet application
and a further wireless security system requirement, the
network administrator will face more difficult challenge
in meeting the ever stringent security design. Securing a
wireless network is even more important than securing a
wired network for one simple reason: Accessing a
wireless network does not require physical access to a
network jack or cable, as does accessing a wired network.
[3], [4]. Wireless networks use radio transmissions to
carry data between end users and the network. Therefore,
it is possible for someone to sit in your office building's
lobby or parking lot to eavesdrop on wireless network
communications.