Questions tagged [rtt]

For questions about Round-trip time (RTT), where it is also called round-trip delay. It is the time required for a signal pulse or packet to travel from a specific source to a specific destination and back again. Use this tag i relation to network delays or troubleshooting.

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20 votes
2 answers

How can the latency value be so low from Singapore to USA (~2ms)?

Here's the ping output from Singapore: 64 bytes from icmp_seq=1 ttl=50 time=1.96 ms Singapore to = ~2ms Another ping output: 64 bytes from icmp_seq=81 ttl=44 time=66....
Al Mamun's user avatar
  • 303
0 votes
1 answer

What is the time of the first RTO in the TCP protocol without knowing the RTT?

I know that 3 way handshake is used. But, the first time a connection is established and there is no RTT data, what is the expected time before sending another packet? How does the client know how ...
toborochi's user avatar
3 votes
1 answer

How is SampleRTT measured once every RTT, without measuring every segment?

According to the RFC, SampleRTT is measured once every RTT. My text: Computer Networking: A top-down approach (6ed By: Kurose & Ross) also states, that: Instead of measuring a SampleRTT for ...
Jurgen's user avatar
  • 133
15 votes
3 answers

Serialization and serialization times in 40G/10G and 100G/25G Ethernet

I've recently been involved in discussions about lowest-latency requirements for a Leaf/Spine (or CLOS) network to host an OpenStack platform. System architects are striving for the lowest possible ...
Marc 'netztier' Luethi's user avatar