Packet Sniffing is a technique used for snooping on network traffic that network engineers have been using for years. It allows network users and administrators to capture each ‘packet’ of data that is transmitted over a network, and then analyze its contents.
Packet sniffing has many legitimate uses. Network engineers can use it to diagnose and troubleshoot network problems or to gather statistics about the performance of a given network.
Unfortunately, it is also used by hackers to steal personal information.
Learn more about Packet Sniffing Attack.