Cisco Certified Network Associate (CCNA) Practice Exam

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What does a high Q number indicate in the #show eigrp neighbors output?

Optimal transmission conditions
A potential problem with transmission
Increased routing efficiency
A lower command response time

The correct answer is: A potential problem with transmission

A high Q number in the output of `show eigrp neighbors` indicates that there are packets waiting in the queue, which suggests that there may be transmission issues on the link. In Enhanced Interior Gateway Routing Protocol (EIGRP), the Q value reflects the number of packets queued to be sent to a neighbor. When the Q number increases, it signals that the router is having difficulty sending out updates effectively, or that there may be congestion on the network. This situation can lead to delayed routing information exchange and can adversely affect overall network performance. Therefore, a high Q number serves as a warning sign of potential problems that need to be addressed to maintain optimal routing operations.