The terms WiFi sniffing and packet sniffing are sometimes used interchangeably, but packet sniffing does not refer to locating WiFi networks, only to monitoring activity on them. The sort of WiFi sniffing that can also be called packet sniffing is used by network administrators to find faults in a network so they can be plugged. This kind of sniffing identifies the packets of data that are being transmitted from or received by the network. The name of the tool for this job is a network analyzer when used by an authorized person, but is more likely to be called a packet sniffer when used by a thief to capture and decode other people’s data. Illegally gaining access to these packets is very similar to wire-tapping.
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