JNCIS-SP: Juniper Networks Certified Specialist – Service Provider Routing (2021) — Question 10

Which two fields of a hello packet must match on both routers when forming an OSPF adjacency? (Choose two.)

Answer options

• A. Hello interval
• B. Designated route
• C. Router priority
• D. Network mask

Correct answer: B, D

Explanation

The Designated route and Network mask must match between routers for OSPF adjacency to be formed, as they ensure that both routers have the same view of the network topology. The Hello interval and Router priority, while important for OSPF operation, do not need to be the same for adjacency to be established.