What does the EIGRP routing table use to maintain information about directly attached neighbors?

The EIGRP (Enhanced Interior Gateway Routing Protocol) routing table utilizes a neighbor table to keep track of directly attached neighbors. This neighbor table is crucial for the protocol, as it stores information about neighboring routers that are directly connected and have established communication. It includes details such as the IP addresses of neighbors, their metrics, and the interfaces used to reach them.

The importance of the neighbor table lies in its role in enabling EIGRP to efficiently manage neighbor relationships and perform tasks such as sending hello packets to maintain these connections. It is fundamental for the protocol's operation, particularly in ensuring that routing updates and communication can be reliably exchanged among routers in the network.

The other options do not serve the same purpose: the route table holds information about the best routes to destinations, the topology table contains route information learned from neighbors, and the link state table is characteristic of different routing protocols, such as OSPF, rather than EIGRP. Thus, the neighbor table is specifically designed for maintaining direct connections with neighboring routers in EIGRP environments.