Which command is used for configuring inbound or outbound filtering in OSPF?

The command used for configuring inbound or outbound filtering in OSPF is the distribute-list configuration. This command allows you to control the redistribution of routes into OSPF from other routing protocols or from static routes.

In OSPF, the distribute-list command can specify a prefix list or an access list that determines which routes will be injected into or filtered out of the OSPF process. When applied, it can filter the routes that OSPF advertises to its neighbors or the routes it learns from those neighbors. This filtering mechanism is crucial for managing the flow of routing information within the network, thereby optimizing routing tables and ensuring that only the desired routes are propagated through the OSPF domain.

While the other options listed are related to route filtering or manipulation, they are not primarily used for OSPF configurations. For example, a prefix list (though useful in route filtering) is generally associated with defining allowed or denied prefixes but does not directly control OSPF behavior as distribute-lists do. Route maps can be employed for complex routing decisions, but they are not specifically for OSPF filtering purposes. An area filter list, on the other hand, is less commonly used and pertains to regulating the type of information exchanged between OSP