Host 1 receives a file from remote server 1． Which MAC address appears as the source address in the header of the frames received by Host 1?

A、 The MAC address of the NIC in Host 1 ．
B、 The MAC address of the NIC in server 1．
C、 The MAC address of the Fa0/0 interface of router R1
D、 The MAC address of the s0/0/0 interface of the router R2

【正确答案】 C

【答案解析】