Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) — Question 71

Which protocol is used to determine the NBMA address on the other end of a tunnel when mGRE is used?

Answer options

• A. NHRP
• B. IPsec
• C. MP-BGP
• D. OSPF

Correct answer: A

Explanation

NHRP (Next Hop Resolution Protocol) is specifically designed to resolve the NBMA addresses in mGRE tunnels. The other options, such as IPsec, MP-BGP, and OSPF, serve different purposes in networking and do not provide the same functionality for resolving addresses in this context.