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I'm studying the ICMP protocol and the tool traceroute. I don't understand how can traceroute look up the domain names of Hops if in the ICMP datagram only the IPs can be found. How does it work?

Thank you!

Adam Lear
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synack
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1 Answers1

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It's called reverse DNS, and is basically the opposite of a domain-to-IP lookup.

Mahmoud Al-Qudsi
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