Refer to the exhibit．If the devices produced the given output,what is the cause of the EtherChannel problem?

A、 There is a speed mismatch between SW1's Fa0/1 and SW2's Fa0/1 interfaces．
B、 There is an MTU mismatch between SW1's Fa0/1 and SW2's Fa0/1 interfaces．
C、 There is an encapsulation mismatch between SW1's Fa0/1 and SW2's Fa0/1 interface．
D、 SW1's Fa0/1 interface is administratively shut down．

【正确答案】 A

【答案解析】EtherChannel中两个端口需要speed一致