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多項(xiàng)選擇題
Host 1 is trying to communicate with Host 2. The e0 interface on Router C is down. Which of the following are true (Choose two.)（）。
A.Router C will use ICMP to inform Host 1 that Host 2 cannot be reached
B.Router C will use ICMP to inform Router B that Host 2 cannot be reached
C.Router C will use ICMP to inform Host 1, Router A, and Router B that Host 2 cannot be reached
D.Router C will send a Destination Unreachable message type
E.Router C will send a Router Selection message type
F.Router C will send a Source Quench message type
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