Nokia Certified Network Associate – Data Center — Question 25

Loopfree-alternate has been enabled on a router for its link-state routing protocol. For which types of segments will the router attempt to find a backup path, so that they become protected by fast re-route?

Answer options

• A. Only segments defined by a Node-SID.
• B. Only segments defined by an Adjacency-SID.
• C. Segments defined by a Node-SID and segments defined by an Adjacency-SID.
• D. No segments, unless segment-routing fast-reroute is also explicitly enabled.

Correct answer: C

Explanation

The correct answer is C because Loopfree-alternate looks for backup paths for both Node-SID and Adjacency-SID defined segments, ensuring comprehensive protection. Option A is incorrect as it only considers Node-SID segments, and option B is wrong for focusing solely on Adjacency-SID segments. Option D is also incorrect since it states that no segments are protected unless fast-reroute is enabled, which is not the case here.