Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) — Question 521

Which protocol must be secured with MD-5 authentication across the MPLS cloud to prevent hackers from introducing bogus routers?

Answer options

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

Correct answer: C

Explanation

LDP (Label Distribution Protocol) is the protocol that requires MD-5 authentication to ensure that only legitimate routers can participate in the MPLS network. While RSVP, LSP, and MP-BGP are important protocols within the MPLS framework, they do not specifically require MD-5 for security against rogue routers.