JNCIS-ENT: Juniper Networks Certified Specialist – Enterprise Routing and Switching (2024) — Question 11

You want to advertise only a default route into a new area, which will be called area 7.
In this scenario, which configuration statement would solve this problem?

Answer options

• A. user@host# set protocols ospf area 0.0.0.7 nssa default-lsa default-metric 10
• B. user@host# set protocols ospf area 0.0.0.7 stub no-summaries
• C. user@host# set protocols ospf area 0.0.0.7 stub default-metric 10
• D. user@host# set protocols ospf area 0.0.0.7 stub

Correct answer: B

Explanation

The correct command is B, which configures area 7 as a stub area that does not send summary LSAs, thereby allowing only the default route to be advertised. Option A is incorrect because it uses NSSA, which is not suited for a simple default route advertisement. Options C and D do not specify the 'no-summaries' parameter, which is crucial for limiting the routes to just the default.