数据转发流程

小贝壳冬冬

请大家帮忙详细解释一下论坛上ccna（200-120）题库的第一题，对于数据的转发流程，我感到很困惑。题目如下，我也做了一个拓扑图（附件）

1.Refer to the exhibit. What willRouter1 do when it receives the data frame shown? (Choose three.)

A. Router1 will strip off the sourceMAC address and replace it with the MAC address 0000.0c36.6965.

B. Router1 will strip off the sourceIP address and replace it with the IP address 192.168.40.1.

C. Router1 will strip off thedestination MAC address and replace it with the MAC address 0000.0c07.4320.

D. Router1 will strip off thedestination IP address and replace it with the IP address of 192.168.40.1.

E. Router1 will forward the datapacket out interface FastEthernet0/1.

F. Router1 will forward the data packet out interfaceFastEthernet0/2.

答案为:ACF

根据我的理解，路由器在收到这个数据帧的时候，应该会解封装，也就是先查看源和目的mac地址，然后再查看源和目的ip地址，不知道这个理解是否正确,请大家帮忙解释一下几个答案。谢谢大家！

小贝壳冬冬

为什么我发的帖子又是空白的？