Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) — Question 354

Which protocol supports labeled paths between PE routers in an MPLS network?

Answer options

• A. LDP
• B. RSVP
• C. MP-BGP
• D. IGP

Correct answer: C

Explanation

MP-BGP is the correct answer because it is specifically designed to carry routing information for MPLS label distribution between Provider Edge (PE) routers. LDP is used for label distribution but does not support labeled paths in the same way as MP-BGP. RSVP is primarily used for resource reservation, and IGP is for interior gateway routing, neither of which are focused on MPLS label paths.