What type of database is used in OSPF to maintain routing information?

The correct choice for the type of database used in OSPF (Open Shortest Path First) to maintain routing information is the link-state database. This database contains information about the state of each link and the routers connected to that link. OSPF is a link-state routing protocol, which means that each router maintains a link-state database that provides a detailed view of the topology of the network.

In a link-state database, routers share information about their directly connected neighbors and the cost of the links to those neighbors. This information allows each router to construct a complete picture of the network's topology. The link-state database is crucial for the OSPF algorithm, which uses the Shortest Path First (SPF) algorithm, known as Dijkstra's algorithm, to compute the shortest paths to various destinations.

The routing table is different; it is derived from the link-state database and contains the best paths to reach various networks, but it does not store the raw state information of the links. Similarly, a distance vector database is associated with distance vector protocols like RIP and does not apply to OSPF, and the term topology database is not a standard term used or recognized in OSPF terminology. Thus, the link-state database is uniquely suited