Cisco Certified Network Professional Practice Test 2026 – Your All-in-One Guide to Exam Success!

The purpose of the Authoritative Flag in NHRP (Next Hop Resolution Protocol) is to indicate that a specific NHRP server is the definitive source of the information related to the mapping between the NHRP client and the next-hop address for a given destination. This flag is crucial in scenarios involving multiple NHRP servers, as it helps the clients to identify which server provides the authoritative mapping. By marking the server as authoritative, the client can prioritize its responses and effectively manage its routing decisions based on accurate and reliable information.

The other choices do not accurately reflect the function of the Authoritative Flag. While dynamic tunnel creation may utilize NHRP in broader terms, it is not specifically what the Authoritative Flag indicates. The establishment of a secure channel for IPSec and data encryption are separate functions not related to the NHRP Authoritative Flag’s purpose, which is focused solely on indicating the source of data regarding next-hop resolutions.