Question 380
Two single-area OSPF routers exchange Hellos on Ethernet and reach 2-WAY, but the routing engineer expects every router on a four-router broadcast LAN to have FULL state with every other router. Which design rule addresses that expectation?
Explanation
Correct Answer
A broadcast OSPF network uses a designated router and backup to avoid maintaining a full mesh of database adjacencies. Two non-DR routers recognize each other as neighbors in 2-WAY state without necessarily synchronizing full adjacency directly. Inspect the DR/BDR relationships before declaring those pairs defective.
Incorrect Answers
Priority zero excludes routers from DR/BDR election and would not create the desired full mesh. At least one eligible router is needed for the ordinary broadcast design.
Area mismatch prevents the ordinary neighbor relationship, rather than increasing adjacency coverage. Peers on the same segment need compatible area settings.
Removing the elected routers is disruptive and does not make broadcast OSPF require a complete adjacency mesh. The expected state is a feature of the network type.