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A、Both FastEthernet 0/0 and Serial 0/0/0 are trusted interface
B、Both FastEthernet 0/0 and Serial 0/0/0 are untrusted interfaces
C、FastEthernet 0/0 is a trusted interface and Serial 0/0/0 is an untrusted interface
D、FastEthernet 0/0 is an untrusted interface and Serial 0/0/0 is a trusted interface