Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) — Question 235

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. ALSO
• C. LDP
• D. MP-BGP

Correct answer: C

Explanation

LDP (Label Distribution Protocol) requires MD-5 authentication to ensure that only legitimate routers can participate in the label distribution process, thus preventing the introduction of rogue routers. Other options such as RSVP and MP-BGP may have their own security requirements, but they do not specifically rely on MD-5 for securing LDP functionalities.