JNCIP-SP: Juniper Networks Certified Professional – Service Provider (2022) — Question 24

Which two statements about wide and narrow metrics used in IS-IS are correct? (Choose two.)

Answer options

• A. Wide metrics are enabled with the wide-metrics-only parameter under protocols isis hierarchy.
• B. Narrow metrics are enabled by default and use 8 bits in TLVs to send information.
• C. Wide metrics are sent by default and use 24 bits in TLVs to send information.
• D. Disabling narrow metrics results in external routes being leaked from L1 to L2 areas automatically.

Correct answer: C, D

Explanation

The correct answer is C and D because wide metrics, by default, are sent using 24 bits in TLVs, while disabling narrow metrics causes external routes to leak from L1 to L2 areas. Options A and B are incorrect as A describes a configuration for enabling wide metrics, and B inaccurately describes the default behavior and size of narrow metrics.