JNCIS-ENT: Juniper Networks Certified Specialist – Enterprise Routing and Switching (2024) — Question 49

What are two characteristics of OSPF ABRs? (Choose two.)

Answer options

• A. ABRs transmit routing information between the backbone and other areas.
• B. ABRs cannot be part of the backbone and another area at the same time.
• C. ABRs inject routing information from outside the OSPF domain.
• D. ABRs link two OSPF areas.

Correct answer: A, D

Explanation

The correct answers are A and D because ABRs (Area Border Routers) are responsible for exchanging routing information between the backbone area and other areas, as well as linking two OSPF areas. Option B is incorrect since ABRs can indeed participate in both the backbone and another area, and option C is wrong because ABRs do not inject external routing information but rather manage internal area routing.