Why your OSPF neighbor relationship is failing (CCNA drill)
Timer mismatches will break your OSPF adjacency every single time. Drop your answer in the comments before time runs out!
The question
Which parameter MUST match between two routers for an OSPF adjacency to form?
The answer
A Hello and dead intervals
Hello and dead timers must match exactly on the link, or the adjacency drops. Don't fall for the trap: process IDs are strictly local. Follow for tomorrow's rep.
Exam tip
Read what the question is actually asking before looking at the options. The wrong answers here are ones candidates genuinely pick — each is true of something adjacent, just not of what was asked.