Cisco Certified Network Associate (CCNA) Practice Exam

The best path to a remote network in EIGRP is referred to as what?

1. Predecessor route

2. Successor route

3. Primary route

4. Preferred route

The correct answer is: Successor route

In Enhanced Interior Gateway Routing Protocol (EIGRP), the best path to a remote network is known as a successor route. This term specifically refers to the route that EIGRP selects as the most efficient and optimal path to reach a destination based on several metrics, such as bandwidth, delay, load, and reliability. When EIGRP calculates routes, it uses the Diffusing Update Algorithm (DUAL) to ensure that the best path is always available for routing packets. The successor route is the primary path that traffic will take to reach its destination, and EIGRP will utilize this route unless it becomes invalid for some reason. If the primary path fails, EIGRP can then use a feasible successor route, which is a backup path that meets specific criteria. The other options refer to terms that are not officially recognized in EIGRP routing terminology. For instance, while "predecessor route" indicates a route that is one step away from the destination, it is not used to identify the best path. "Primary route" and "preferred route" could colloquially suggest a preferred pathway but do not have specific meaning in the context of EIGRP terminology and functioning. Thus, the term "successor route" is the correct