I often tested network using ping command.
When I test,displayed "Timeout" and "Network
Unreachable".
I understood if "Timeout" displayed,ICMP cannot
reach distination network cause of IP filtering or
Physical problem etc...
And if "Network Unreachable" displayed,cause of
routing-table problem.
Is this understanding correct?or if "Network Unreachable" displayed,can replied cause of
others?
