In the OSPF Full state, what do the routers have in common?

In the OSPF Full state, routers have established a full OSPF adjacency, which means that they have successfully exchanged link-state advertisements (LSAs) and are fully aware of each other's link-state database (LSDB). This state indicates that both routers have synchronized their LSDBs, allowing them to have a consistent view of the network topology. This synchronization is crucial for OSPF's operation, as it ensures that all routers in the OSPF area have the same information and can make informed routing decisions.

The Full state is the final stage of the OSPF neighbor adjacency process, which begins with routers in the Down state and progresses through the Init, 2-Way, and Exstart states before reaching Full. Thus, when routers are in the Full state, they are prepared to route traffic effectively based on their consistent understanding of the network.

The other options do not accurately represent the relationship between routers in the OSPF Full state; for instance, a disjointed LSDB suggests a lack of synchronization, which is not the case in the Full state. Similarly, incomplete LSAs and unacknowledged packets indicate communication issues that do not align with the Full state status.