Exam 300-410 topic 1 question 449 discussion

The answer is C. In an MPLS network, Service Provider Edge (PE) routers use Multiprotocol Border Gateway Protocol (MP-BGP) to exchange label and route information with each other. MP-BGP is the routing protocol used to create and distribute labels between service provider edge routers on an MPLS network.

I think it's A because MP-BGP peers still use LDP to push traffic over an MPLS core

I think the answer is A. MP-BGP only assigns labels to VPNs, it does not build label paths.

Tha answer is A

I choose A

The protocol that supports labeled paths between PE (Provider Edge) routers in an MPLS (Multiprotocol Label Switching) network is LDP (Label Distribution Protocol), although RSVP-TE (Resource Reservation Protocol - Traffic Engineering) is also commonly used for more advanced features.

A is the correct answer. LDP is the primary protocol for establishing label-switched paths (LSPs) within an MPLS network. MP-BGP is used to exchange VPN routes and label information between PE routers in an MPLS VPN environment, but is not directly involved in establishing labeled paths MP-BGP is primarily used to advertise customer prefixes and associated labels.

Guys why exactly you say C ? it's A , it says between PE routers . P routers play only with IGP and LDP . MP-BGP and actually MP-ibgp is used for different reason. Is used to distributing VPN routes , VPNv4 routes. LDP is used to create the paths. RSVP is used for traffic engineering.

This is hard. Can anyone explain why it isn't C??

C is correct

Yes, C is the answer!

Multi-Protocol BGP extensions carry VPN policies from PE to PE. https://www.ciscolive.com/c/dam/r/ciscolive/us/docs/2019/pdf/BRKMPL-1100.pdf