JNCIS-SP: Juniper Networks Certified Specialist – Service Provider Routing — Question 13

Which two statements correctly describe IS-IS adjacencies? (Choose two.)

Answer options

• A. Level 1 adjacencies can form in the same (intra) area only.
• B. Level 2 adjacencies are formed between (inter) areas only.
• C. Level 2 adjacencies can be established either interarea or intra-area.
• D. Level 2 adjacencies can form within the same (intra) area only.

Correct answer: A, C

Explanation

The correct answers are A and C because Level 1 adjacencies are indeed confined to the same area, while Level 2 adjacencies can be formed across different areas as well as within the same area. Options B and D are incorrect as they misrepresent the nature of Level 2 adjacencies, which are not limited to intra-area formations.