Which two control-plane protocols operate on P routers in the MPLS core? (Choose two.)

LDP (Label Distribution Protocol) and RSVP (Resource Reservation Protocol) are control-plane protocols that operate on P (Provider) routers in the MPLS core. LDP is used to distribute labels for best-effort forwarding, creating LSPs (Label Switched Paths) based on the IGP (Interior Gateway Protocol) routing table. RSVP, specifically RSVP-TE (Traffic Engineering), is used to establish explicitly routed LSPs, allowing for traffic engineering and resource reservation. ECMP (Equal-Cost Multi-Path) is a forwarding mechanism, not a control-plane protocol. MPLS OAM (Operations, Administration, and Maintenance) refers to tools and mechanisms for managing and troubleshooting MPLS networks, not a label distribution protocol. LSP (Label Switched Path) is the path itself, not a protocol.