What is a packet sniffer and how is it used in hacking?

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What is a packet sniffer and how is it used in hacking?

A packet sniffer is a tool or software used to capture and analyze network traffic. It intercepts and logs data packets that are being transmitted over a network. In hacking, a packet sniffer is used to capture sensitive information such as usernames, passwords, credit card details, or any other data being transmitted over the network. By analyzing the captured packets, hackers can gain unauthorized access to systems, exploit vulnerabilities, or launch various types of attacks.