Hi every body.
My book says when we use ping, we could receive five poossible responses identified by code in the output. For example:
! echo reply received
. nothing was received, ping timed out
U Icmp unreachable( destination )
N icmp unreahable( network)
M can not fragment the packet
? unknown packet received.
=================================
Let say we are not using ping, we are using wireshark.
we can capture Icmp messages exchanged between hosts when trouble occurs .
According to book, ICmp unreachable messages can includes fives seperate unreacable codes that further identify why the packet cannot be delivered.
These codes are:
Network unreachable:
host unreacable
Can't fragment
protocol unreachable
port unreachable
what are the alphabitical codes to represent these above messages?
thanks a lot.
