Next Hop Resolution Protocol (NHRP)

Next Hop Resolution Protocol (NHRP) is a network protocol used primarily in large, complex networks to efficiently identify the next destination or "hop" for data packets. When a device needs to send data, NHRP helps it quickly find the IP address of the next device or router along the path, especially in VPN or MPLS environments. This improves routing efficiency by reducing unnecessary data transmission and ensuring that data takes the optimal route. Essentially, NHRP acts as a directory service, enabling devices to discover the best way to reach their destination in a large or dynamic network.