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Can't ping time.aws.com. When I mtr it, it's over 60 milliseconds away, I think i'll stick to time.cloudflare.com which pings in 5 milliseconds



How is ping latency a measure of time accuracy?


It's a bound on inaccuracy from assumptions made about communication delays? I believe a protocol like NTP assumes delays are symmetric, and uses half the round trip time. There's no guarantee that delays are symmetric or repeatable, though.




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