Designing Cisco Enterprise Networks (ENSLD) — Question 63

Which OSPF area blocks LSA Type 3, 4 and 5, but allows a default summary route?

Answer options

• A. normal
• B. stub
• C. NSSA
• D. totally stubby

Correct answer: D

Explanation

The correct answer is D, totally stubby area, as it blocks external LSA Type 3, 4, and 5 but allows a default route. Option B, stub area, allows LSA Type 3 but blocks others, while option C, NSSA, permits Type 3 LSAs from external sources. Option A, normal area, does not restrict any LSAs.