Which two are control-plane protocols used inside a service-provider MPLS network?

LDP (Label Distribution Protocol) and RSVP-TE (Resource Reservation Protocol - Traffic Engineering) are both control-plane protocols used in MPLS networks. LDP is commonly used for distributing labels for IP forwarding equivalence classes (FECs) based on the IGP's best path, creating an implicit LSP. RSVP-TE, on the other hand, is used for explicitly establishing LSPs with specific bandwidth and path constraints, crucial for traffic engineering. OAM (Operations, Administration, and Maintenance) is a management plane function, not a control-plane protocol for label distribution. SNMP (Simple Network Management Protocol) is also a management plane protocol used for monitoring and managing network devices. Targeted LDP is a mode of LDP, not a separate protocol, used for establishing LDP sessions between non-directly connected routers, but LDP itself is the core control-plane protocol.