Cisco 200-125 Exam

Refer to the graphic. Host A is communicating with the server. What will be the source MAC address of the frames received by Host A from the server?

  • A. the MAC address of the server network interface
  • B. the MAC address of host A
  • C. the MAC address of router interface e1
  • D. the MAC address of router interface e0
Answer: Option D.
Explanation: 

Host A and the Server are on different subnets and are separated by routers, so the MAC address of the Server will never get back to Host A: the router will decapsulate the frames that the Server sends. The router will re-encapsulate the packets from the Server and and put its own MAC address on the outbound interface (e0) in the frames. Host A will see the MAC address of router interface e0.

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