JNCIP-SP: Juniper Networks Certified Professional – Service Provider (2023) — Question 74

A router running IS-IS is configured with an ISO address of 49.0001.00a0.c96b.c490.00.
Which part of this address is the system ID?

Answer options

• A. c96b.c490 is the system identifier.
• B. c490 is the system identifier.
• C. 00a0.c96b.c490 is the system identifier.
• D. 0001.00a0.c96b.c490 is the system identifier.

Correct answer: C

Explanation

The correct answer is C because in the ISO address format, the system ID is defined as the last three octets following the initial domain identifier. Options A and B are incorrect as they refer to parts of the address that do not constitute the complete system ID, while option D includes the domain identifier, which is not part of the system ID.