Which OSPF area blocks both Type 3 and 5 LSAs?
Test your CCNP routing knowledge on OSPF area types and LSA filtering. Drop your answer in the comments!
The question
Which OSPF area type blocks both Type 3 summary LSAs and Type 5 external LSAs?
The answer
A Totally Stubby Area
Totally stubby areas filter Type 3, 4, and 5 LSAs, injecting just a single default route. Watch out: standard stubs still allow Type 3s!
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.