JNCIS-SP: Juniper Networks Certified Specialist – Service Provider Routing — Question 32

Your company has purchased two new Juniper Networks MX480 routers. Your manager has asked you to add these two devices to the existing ISIS network.
Which two rules about ISIS adjacencies must you consider when carrying out the configuration? (Choose two)

Answer options

• A. For Level 1 adjacencies, area IDs must be the same
• B. For Level 2 adjacencies area IDs must be the same
• C. The IS-IS levels configured on the interfaces must be the same
• D. The IS-IS levels on the interfaces can be different

Correct answer: A, C

Explanation

Answer A is correct because Level 1 adjacencies require that area IDs match for proper communication. Answer C is also correct as the IS-IS levels on the interfaces must align to establish and maintain adjacencies. Answers B and D are incorrect because Level 2 adjacencies do not have the same requirement for area IDs, and different IS-IS levels on interfaces would prevent effective adjacency formation.