[ntp:questions] NIST vs. pool.ntp.org ?
david at ex.djwhome.demon.invalid
Wed Mar 27 21:45:38 UTC 2013
Robert Scott wrote:
> I am confused about the proper usage of pool.ntp.org and NIST.
> pool.ntp.org seems to be a collection of private sector time servers
> offered for all to use, but with registration expected for regular
The pool system has no provision for enforcing registration. It
wouldn't make sense to hand out a random server address if most of them
then refused to serve you because you hadn't registered.
> users. And NIST has a government run set of time servers. Neither
> group (NIST or pool.ntp.org) seems to include or referece the other.
I would hope all the pool servers ultimately reference their national
equivalent of NIST and therefore what becomes, after the fact, UTC.
I think you will find that Navstar (GPS) and WWV times are traceable to
MSF times are traceable to NPL.
> Are they in competition? Who normally uses the NIST servers and who
> uses pool.ntp.org?
The open NIST servers are heavily overloaded, so probably don't serve
the highest quality time, but they are likely to be around for a long time.
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