Cisco Certified Network Associate (CCNA) Practice Exam 2025 - Free CCNA Practice Questions and Study Guide

The Hold Time field in the #show eigrp neighbors output indicates the amount of time a router will wait without receiving a hello packet from a neighbor before considering the neighbor down. In EIGRP, hello packets are sent periodically to maintain neighbor relationships, and the Hold Time is a critical aspect of this process. If a router does not receive a hello packet from its neighbor within the duration specified by the Hold Time, it will assume that the neighbor is no longer reachable and will remove it from its neighbor table.

In contrast, the Uptime field represents how long the neighbor relationship has been established, while the RTO (Retransmission Timeout) is related to the time a router waits for an acknowledgment of a packet sent to the neighbor, typically associated with more general packet transmission issues. The SRTT (Smooth Round Trip Time) measures the estimated round-trip time for packets sent to the neighbor, which is also important but not directly related to the neighbor's hello packet receipt timeline. Thus, Hold Time is the correct answer as it directly pertains to the waiting period for hello packets specifically in the context of maintaining EIGRP neighbor relationships.