Enhanced Interior Gateway Routing Protocol (EIGRP) is a dynamic routing protocol used in computer networks to facilitate efficient data packet routing. Developed by Cisco, EIGRP combines the advantages of both distance-vector and link-state protocols, allowing routers to share information about network topology and reachability. It uses a metric based on bandwidth, delay, load, and reliability to determine the best path for data transmission. EIGRP supports rapid convergence, meaning it quickly adapts to changes in the network, such as link failures. It also employs a unique algorithm called DUAL (Diffusing Update Algorithm) to ensure loop-free routing and optimal path selection. This makes EIGRP suitable for large and complex networks.