Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) — Question 584

Which protocol does MPLS use to support traffic engineering?

Answer options

• A. TDP
• B. RSVP
• C. LDP
• D. BGP

Correct answer: B

Explanation

RSVP (Resource Reservation Protocol) is the correct answer because it is specifically designed to reserve resources across a network for traffic engineering in MPLS. TDP (Tag Distribution Protocol) and LDP (Label Distribution Protocol) are used for label distribution but do not handle traffic engineering. BGP (Border Gateway Protocol) is primarily used for routing between different networks rather than for traffic engineering within an MPLS environment.