Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) — Question 378

Why do Cisco MPLS TE tunnels require a link-state routing protocol?

Answer options

• A. The link-state database provides segmentation by area, which improves the path-selection process.
• B. The link-state database provides a data repository from which the tunnel endpoints can dynamically select a source ID.
• C. Link-state routing protocols use SPF calculations that the tunnel endpoints leverage to implement the tunnel.
• D. The tunnel endpoints use the link-state database to evaluate the entire topology and determine the best path.

Correct answer: D

Explanation

The correct answer is D because tunnel endpoints need a comprehensive view of the network topology to make informed decisions about the best path. The other options do not accurately represent the primary function of link-state protocols in the context of MPLS TE tunnels.