[ntp:questions] Re: isolated network + accuracy
bg at lysator.liu.se
Tue Dec 14 17:52:45 UTC 2004
"David J Taylor" <david-taylor at invalid.com> writes:
> Bjorn Gabrielsson wrote:
> > "Richard B. Gilbert" <rgilbert88 at comcast.net> writes:
> >> Using an internet server as a time source will almost certainly not
> >> allow you to achieve 1ms accuracy! 10ms accuracy is possible over
> >> the internet but cannot be guaranteed.
> > I get sub 1ms time from internet servers.
> What precise type of connection do you have to the Internet?
Slow assymetric ADSL. (0.5Mbit downstream , 0.768Mbit/s upstream)
The ntp servers are (today) 10 to 13 router hops away, 10 to 20 ms
"ping"-distance and 200 to 600km physical distance.
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