What is Kismet Sniffer

Kismet is an 802.11 wireless network detector, sniffer, and intrusion
detection system. Kismet will work with any wireless card which
supports raw monitoring mode, and can sniff 802.11b, 802.11a, 802.11g,
and 802.11n traffic (devices and drivers permitting).

Kismet also sports a plugin architecture allowing for additional
non-802.11 protocols to be decoded.

Kismet identifies networks by passively collecting packets and detecting
networks, which allows it to detect (and given time, expose the names
of) hidden networks and the presence of non-beaconing networks via data