Round Trip Time
In plain terms
The time for a signal to go to a destination and back.
Going deeper
RTT measures how long a packet takes to reach a host and return, a key latency metric affecting responsiveness. Lower RTT feels snappier.
Under the hood
Influences TCP throughput and perceived speed; distance, congestion, and hops increase it.
Examples
Ping results, latency measurement, TCP performance, network diagnostics.
Think of it like...
Like timing how long until an echo returns after you shout.