Cisco Certified Network Associate (CCNA) Practice Exam

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What does SRTT stand for in the context of #show eigrp neighbors?

Shortest Route to Transmission Time
Static Routing Table Time
Smoothed Round Trip Time
Single Route Transport Time

The correct answer is: Smoothed Round Trip Time

SRTT stands for Smoothed Round Trip Time, which is a metric used in the context of EIGRP (Enhanced Interior Gateway Routing Protocol) to estimate the amount of time it takes for a packet to travel from the source to a destination and back again. This measurement is crucial for EIGRP as it helps in assessing the reliability and responsiveness of a neighbor's link. The computation of SRTT uses a smoothing algorithm to average the round trip times over time, allowing the protocol to adapt dynamically to changing network conditions without being overly sensitive to short-term fluctuations. This results in more stable routing decisions and helps prevent unnecessary route flapping. Understanding SRTT is essential for network professionals as it directly impacts the performance and stability of EIGRP routing decisions. The smoother the round trip time, the more reliable the communication between neighbors will be, which contributes to the overall efficiency of the routing protocol.