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A comment on Show HN: How did your computer reach my server?. Parent comment

Re:Show HN: How did your computer reach my server? by js2 on Tuesday December 05, 2023 @04:10PM (#38536939)
It's IP and ICMP and possibly UDP, which are all part of TCP/IP, aka the Internet protocol suite.
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Re:Show HN: How did your computer reach my server? by geraldcombs on Tuesday December 05, 2023 @04:43PM (#38537331)
The traceroute that ships with macOS supports ICMP, UDP, TCP, and GRE. As I recall, the one(s) available on most Linux distributions do as well.
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