RTT measures the total time for a signal to travel to a destination and for the response to travel back — a full round trip, not just one direction.
Why the Round Trip Matters
Most practical network interactions (like loading a webpage) inherently require a response, making RTT often more relevant than one-way latency alone.
Measuring It
The ping command reports RTT directly, giving a quick, practical sense of how responsive a connection to a given server actually is.
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