Networking
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Why Ping Works Without Any Port Number
Ping works, but which port does it even use? I can't find it.
Quick check · tap an answer to continue
Lesson notes
Takeaway: Ping is ICMP over IP: echo request out, echo reply back, no ports.
Quick check: Which protocol carries ping's echo request and reply messages?
- UDP on port 7
- ICMP directly over IP
- TCP on port 80
Ping uses ICMP Echo Request and Echo Reply, carried straight inside IP packets.
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