A system and method for detecting unauthorized use of a wireless local
area network is described, wherein the network includes mobile units that
communicate with at least one access point. First network traffic data is
accumulated at a mobile unit. Second network traffic data is accumulated
at an access point. The first and second traffic data is communicated to
a computer and is correlated by the computer to identify non-correlated
traffic data. An alarm condition is signaled when the non-correlated
traffic data exceeds a threshold.