Two routers configured with a OSPF link-state routing protocol are unable to establish a neighbor relationship. Which mismatch is most likely causing this issue?
Different router priorities
Different process IDs
Mismatched area IDs
Different interface descriptions
In link-state routing protocols like Open Shortest Path First (OSPF), routers must be in the same area to form a neighbor adjacency. A mismatch in area IDs will prevent the routers from establishing a neighbor relationship. Process IDs are locally significant identifiers and do not need to match between routers. Interface descriptions are used for administrative purposes and do not affect routing protocol operations. Router priorities influence the selection of a designated router (DR) but do not prevent neighbor formation.
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