The Dev-1 and Dev-3 routers are OSPF neighbors over the Ethernet 0/0 connection. Based on the show ip ospf neighbor output from the Dev-1 and Dev-3 routers, which statement is true?
Select the best response.
A.
Dev-1 is the DR because it has a higher OSPF router priority.
B.
Dev-1 is the DR because it has a lower OSPF router ID.
C.
Dev-3 is the DR because it has a higher OSPF router priority.
D.
Dev-3 is the DR because it has a lower OSPF router ID.
E.
Both Dev-1 and Dev-3 are using the default OSPF router priority.
Answer: A
Explanation
The priority helps determine the DR and BDR on the network to which this interface is connected. Priority is an 8-bit field based on which DRs and BDRs are elected. The router with the highest priority becomes the DR. If the priorities are the same, the router with the highest router ID becomes the DR. By default, priorities are set to 1.
Notice that the Priorities shown in the output above are the priorities of the neighbors so the priority of router Dev-1 is 2 while the priority of Dev-3 is 1 -> the priority of Dev-1 is higher than that of Dev-3 -> Dev-1 is the DR.
http://www.ccnproute.net/642-902-qa-implement-a-multi-area-ospf-network-51-55.html — question 55 has the graphic