What is causing the problem?
A. There is an OSPF hello and dead interval mismatch.
B. There is a PPP authentication issue; the username is not configured on R3 and R6.
C. The R3 router ID is configured on R6.
D. There is an area ID mismatch.
Answer:C
What is causing the problem?
A. There is an OSPF hello and dead interval mismatch. B. There is a PPP authentication issue; the username is not configured on R3 and R6. C. The R3 router ID is configured on R6. D. There is an area ID mismatch.
Explanation: Using the show running-config command we see that R6 has been incorrectly configured with the same router ID as R3 under the router OSPF process.