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Round Trip Time (RTT) - Glossary | MDN 1/3 https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time reference web, html, css, javascript, documentation 2026-05-05T05:43:08.325739+00:00 kb-cron

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  1. Glossary
  2. Round Trip Time (RTT)

Round Trip Time (RTT)

Round Trip Time (RTT) is the length of time it takes for a data packet to be sent to a destination plus the time it takes for an acknowledgment of that packet to be received back at the origin. The RTT between a network and server can be determined by using the ping command. This will output something like:

PING example.com (216.58.194.174): 56 data bytes
64 bytes from 216.58.194.174: icmp_seq=0 ttl=55 time=25.050 ms
64 bytes from 216.58.194.174: icmp_seq=1 ttl=55 time=23.781 ms
64 bytes from 216.58.194.174: icmp_seq=2 ttl=55 time=24.287 ms
64 bytes from 216.58.194.174: icmp_seq=3 ttl=55 time=34.904 ms
64 bytes from 216.58.194.174: icmp_seq=4 ttl=55 time=26.119 ms
--- example.com ping statistics ---
5 packets transmitted, 5 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 23.781/26.828/34.904/4.114 ms

In the above example, the average round trip time is shown on the final line as 26.8ms.

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