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單項(xiàng)選擇題

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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單項(xiàng)選擇題

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

單項(xiàng)選擇題

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

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