Wireless local area networks are becoming increasingly popular. The popularity of 802.11 Wireless LAN causes some serious threats due to some weakness in configuration and implementation of wireless network. There are several potential problems with allowing end users to add wireless or other devices to the company network without approval. One big one is they may not employ the proper security measures. There are also the issues of maintaining control of the organizations' infrastructure. Such devices which have been configured without approval of network administrator termed as a rouge access point.