JNCIS-ENT: Juniper Networks Certified Specialist – Enterprise Routing and Switching (2023) — Question 2

You are currently defining a new OSPF area. The area must advertise external routes but should not receive external routes from another area.
In this scenario, which type of area should you define?

Answer options

Correct answer: A

Explanation

The correct answer is 'stub' because a stub area only allows external routes to be advertised into it, while blocking incoming external routes from other areas. The 'backbone' area is essential for OSPF operation but does not have the same restrictions. 'Not-so-stubby' areas allow both external routes and inter-area routes, which contradicts the requirement. 'Totally stubby' areas prevent external routes from entering but also block inter-area routes, which is not suitable for this scenario.