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______________ is a common tool used for doing OS fingerprinting.

(a) Hping

(b) Wireshark

(c) Nmap

(d) Nessus

This question was posed to me during an online interview.

My question comes from Fingerprinting in division Cyber Security of Cyber Security

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Correct option is (c) Nmap

The best explanation: Nmap is a common tool that is used for performing OS fingerprinting. Before targeting any system for the attack, it is necessary to know what OS the website is hosting, which can be found out using some simple command of this tool.

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