How ICMP is used in ping and traceroute facilities
Answer Posted / hasan
ICMP works on
echo-request n echo-reply
in network communications devices echo-request/reply's open
open in network security devices echo-request/reply is
close as inbound traffic is restricted by default.
so by this process of echo-request n echo-reply the PING
and traceroute works and gives the information that the
channel is established.
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