EIGRP (Enhanced Interior Gateway Routing) is a dynamic routing protocol for IP networks. It is considered a hybrid protocol type that supports a classless routing technique and uses the Diffusing Update Algorithm (DUAL) to help improve protocol efficiency and routing calculations. EIGRP was designed as a Cisco proprietary protocol for Cisco routers and uses composite metrics (BW, Load, Delay, Reliability, MTU). Enhanced Interior Gateway Routing Protocol uses MD5 and SHA-256 for authentication. It uses an admin distance of 90 for internal routes, 170 for external routes, and 5 for summary routes. EIGRP has a multicast address of 224.0.0.10 and supports Read More …