COMPUTER NETWORKING

Detailed explanation-1: -Diffusing Update Algorithm (DUAL) is an algorithm used by EIGRP to select and maintain the best route to each remote network. DUAL is also used for the following purposes: discover a backup route if there is one available.

Detailed explanation-2: -The topology table is where EIGRP stores the information for up to six alternate routes to a particular network. The backup routes are called feasible successors. The feasible successors stored in the topology table are what makes it possible for EIGRP to converge rapidly or even instantly.

Detailed explanation-3: -Technical details. EIGRP is a distance vector & Link State routing protocol that uses the diffusing update algorithm (DUAL) (based on work from SRI International) to improve the efficiency of the protocol and to help prevent calculation errors when attempting to determine the best path to a remote network.