Troubleshooting and Maintaining Cisco IP Networks (TSHOOT, legacy) — Question 48

Which protocol does mGRE use to determine where packets are sent?

Answer options

• A. CEF
• B. EIGRP
• C. NHRP
• D. DMVPN

Correct answer: A

Explanation

The correct answer is A, CEF, as it is used by mGRE to efficiently route packets by maintaining a forwarding table. EIGRP, NHRP, and DMVPN are related technologies but do not directly govern packet forwarding decisions in the context of mGRE.