[time-nuts] NIST time services

Hal Murray hmurray at megapathdsl.net
Mon Mar 24 02:50:32 EDT 2014

albertson.chris at gmail.com said:
> The assumption NTP makes is that  you can judge the quality of a server by
> the variance (of "jitter") in the time it reports. 

I think it's more complicated than that.

I think it also includes the non-jitter part of the round trip time.  NTP 
assumes the path is symmetric.  Any constant asymmetry will turn into an 
apparent fixed offset.  I think ntpd is smart enough to include that in it's 
calculations of the clock quality, but I don't understand the details.

These are my opinions.  I hate spam.

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