A network administrator is testing network connectivity by issuing the ping command on a router. Which symbol will be displayed to indicate that a time expired during the wait for an ICMP echo reply message?
Answers Explanation & Hints:
When the ping command is issued on a router, the most common indicators are as follows: ! – indicates receipt of an ICMP echo reply message
. – indicates a time expired while waiting for an ICMP echo reply message
U – an ICMP message of unreachability was received