JNCIS-ENT: Juniper Networks Certified Specialist – Enterprise Routing and Switching (2023) — Question 13

Which three statements are true regarding not-so-stubby areas (NSSAs)? (Choose three.)

Answer options

• A. You cannot configure an area as both an NSSA and a stub area.
• B. An NSSA exports an external route to the backbone area as a Type 5 LSA.
• C. An NSSA exports an external route as a Type 3 LSA.
• D. An NSSA does not require an ABR.
• E. An NSSA imports an external route as a Type 7 LSA.

Correct answer: A, B, E

Explanation

Answer A is correct because an area cannot be both an NSSA and a stub area due to conflicting functionalities. Answer B is incorrect as NSSAs export external routes as Type 7 LSAs, not Type 5. Answer C is wrong since NSSAs do not export external routes as Type 3 LSAs; they utilize Type 7 LSAs for this purpose. Answer D is incorrect because NSSAs do require an ABR for the connection to the backbone area. Answer E is correct, as NSSAs import external routes as Type 7 LSAs.