Wireless scanning is a method to find an available wireless network access point. It allows you to identify wireless networks through the use of WNIC (wireless network interface card) running in promiscuous mode and a software that will probe for access points. Once an open wireless access point is found, the wardriver usually maps it, so at the end he would have a map of access points with their properties (SSID, WEP, MAC etc.). Whenever the attacker wants to return into the network, he/she usually logs packets for later analysis, or to run them though a WEP key cracker when a weak key is being used.
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