What occurs when EIGRP loses information about a network?

When EIGRP loses information about a network, it sends a query packet to all neighbors. This behavior is part of EIGRP's route recovery mechanism. If a router cannot determine the best path to a destination—due to a failed route or loss of information—it proactively queries its neighbors to find alternative paths. This querying process allows the router to gather information about the status of the route from adjacent routers, ensuring that it can make an informed decision about the quickest and most efficient path to the destination.

The query mechanism is critical for maintaining network stability and fast convergence. By asking its neighbors for route information, EIGRP ensures that any changes in the network topology or routing updates are quickly communicated and understood, facilitating rapid adjustment to maintain connectivity.

In contrast, the other options do not accurately depict EIGRP's behavior in this scenario. Immediate deletion of a route from the routing table can lead to disruptions; instead, EIGRP uses its query capability to confirm path availability. Automatic re-establishment of routes using backup paths depends on the existence of feasible successors, but losing information prompts queries rather than automatic restoration without neighbor input. Transitioning to passive mode is a concept more associated with the operation of routing processes in protocols like OSPF, and