Cisco 200-105 Exam

Routers R1 and R2 are on the same network segment, and both routers use interface GigabitEthernet0/0. If R1 loses communication to R2, which two items should you check as you begin troubleshooting? (Choose two.)

  • A. Verify that R2 is using 802.1q encapsulation.
  • B. Verify that the GigabitEthernet0/0 interfaces on R1 and R2 are configured with the same subnet mask.
  • C. Verify that the R1 GigabitEthernet0/0 interface is up and the line protocol is down.
  • D. Verify that R1 and R2 both are using HDLC encapsulation.
  • E. Verify that the R1 GigabitEthernet0/0 interface is up and the line protocol is up.
Answer: Option B. E.
Explanation: 

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