How does the ping command differentiate between its ICMP responses and anothers?

Question

If I have two shells open each pinging the same host, how do the two shells differentiate between the ICMP responses coming back for each shell?

score 12 · Accepted Answer · edited Oct 07 '21 at 06:47

12

The request includes a 2-byte Identifier field, which must match in the reply. This is separate from the Sequence field. You can see it described in RFC 792

edited Oct 07 '21 at 06:47

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answered Jul 09 '12 at 03:19

eey0re

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How does the ping command differentiate between its ICMP responses and anothers?

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