单选题An administrator attempts a traceroute but receives a "Destination Unreadable" message. Which protocol is responsible for that message?（）ARARPBRUDPCICMPDSNMP
单选题
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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解析：
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