单项选择题
An administrator attempts a traceroute but receives a "Destination Unreadable" message. Which protocol is responsible for that message?（）
A. RARP
B. RUDP
C. ICMP
D. SNMP
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相关考题
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单项选择题
When a host transmits data across a network to another host, which process does the data go through?（）
A. standardization
B. conversion
C. encapsulation
D. synchronization -
单项选择题
A network admin wants to know every hop the packets take when he accesses cisco.com. Which command is the most appropriate to use?（）
A. path cisco.com
B. debug cisco.com
C. trace cisco.com
D. traceroute cisco.com -
单项选择题
Which line from the output of the show ip interface command indicates a layer 1 problem?（）
A. Serial0/1 is up, line protocol is down
B. Serial0/1 is down, line protocol is down
C. Serial0/1 is up, line protocol is up
D. Serial0/1 is administratively down, line protocol is down
