Cisco Certified Network Associate (CCNA) Practice Exam

Which command changes the administrative distance of a route on an EIGRP router?

1. distance 91 REMOTE NETWORK OR DEVICE

2. bandwidth LOWER BANDWIDTH NUMBER

3. show ip route

4. clear ip cache

The correct answer is: distance 91 REMOTE NETWORK OR DEVICE

The command that changes the administrative distance of a route on an EIGRP router is indeed the option that modifies the distance parameter. By using the command to set the administrative distance to a specific value, a network administrator can influence route selection and preference among different routing protocols. This is particularly useful in situations where multiple protocols may provide routes to the same destination. The administrative distance is a value that ranks the trustworthiness of the source of the route. Lower values are more preferred; hence adjusting this value allows for more granular control over routing decisions made by the router. In practical networking scenarios, changing administrative distance can help manage and optimize routing behavior, especially in complex network environments. The other options provided serve different functions within the context of routing or EIGRP configuration. For instance, bandwidth settings affect how routing protocols calculate their metrics, while the command to show the IP route is used for viewing the current routing table, and clearing the IP cache is typically used for refreshing routing information or resolving issues related to dynamically learned routes. These commands do not modify the administrative distance of a route.