Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) — Question 359

Which two protocols work in the control plane of P routers across the MPLS cloud? (Choose two.)

Answer options

• A. ECMP
• B. LDP
• C. RSVP
• D. MPLS OAM
• E. LSP

Correct answer: B, C

Explanation

LDP (Label Distribution Protocol) and RSVP (Resource Reservation Protocol) are both essential for establishing and maintaining label switched paths in MPLS networks, operating in the control plane of P routers. ECMP (Equal-Cost Multi-Path) is related to routing decisions but not a control plane protocol, while MPLS OAM (Operations, Administration, and Maintenance) and LSP (Label Switched Path) do not function as control protocols themselves.