> TTL (Time To Live) is a counter value in an IP packet that gets decremented
> by every "hop" (router). When it reaches a value of zero, the packet is
One more thing . If the packet is going to be forwarded and the TTL has value of 1
than the hop discards the packet .
"A system should never receive IP datagram with TTL of 0 , but Net/3 generates the
correct ICMP error if this happens since ip_ttl is examined after the packet is
considered for local delivery and before it is forwarded"
[TCP/IP Illustrated , Volume 2 - Gary R. Wright , W.Richard Stevens]
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