What do OSPF filters affect?

OSPF filters specifically affect the Link State Advertisements (LSAs) for routes within a particular area. This means that they control how OSPF routes are advertised between routers that are part of the same area or between different areas. By applying filters, you can control which LSAs are propagated, thus managing the visibility and inclusion of certain routes in the OSPF domain.

Using filters for OSPF can help in optimizing routing by limiting the flooding of unnecessary LSAs, which can reduce the CPU and memory overhead on routers and improve overall network performance. Such filtering capabilities allow for finer control over OSPF routing behaviors, ensuring that only the relevant routes are considered and exchanged between OSPF peers.

Other options suggest effects of filters on the routing table, routes from other protocols, or static configurations, which do not accurately describe the operational scope of OSPF filters. OSPF filters are primarily about controlling the propagation of routing information through OSPF itself, rather than directly impacting the static routes or other protocol routes.