Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) — Question 295

What is the purpose of RSVP tear messages?

Answer options

• A. to inform the headend router of LSP issues
• B. to confirm successful end-to-end resource allocation
• C. to reuse router resources for other reservation requests
• D. to notify the tail-end router of resource unavailability on the transit router

Correct answer: C

Explanation

The correct answer is C, as RSVP tear messages are used to release resources in a router, allowing them to be utilized for other reservation requests. Option A is incorrect because tear messages do not primarily inform about LSP issues; they deal with resource management. Option B is wrong since tear messages do not confirm resource allocation, and option D is not accurate as the tear messages do not specifically notify about resource unavailability.