[ntp:questions] http://www.ntp.org/ => a blank page?

Rob nomail at example.com
Tue Mar 10 08:49:16 UTC 2009

Martin Burnicki <martin.burnicki at meinberg.de> wrote:
> IMHO DNS is not like NTP in the sense that is just *starts* sending queries
> for domains which have not yet been resolved to the root DNS servers and
> then are redirected/go on down to the authoritative DNS for that domain,
> whereas NTP would stuck with the top level servers if they have been
> configured.
> However, if several local subnets needed to resolve "microsoft.com" then
> each one would have to ask the root servers the first time.
> If you send DNS queries to your ISP's servers then this would save bandwidth
> since they are normally closer to your network than the root DNS servers,

Also don't forget that it will save time too, when you are on a connection
with some roundtriptime.

When you use the ISP forwarder, you make a single request to the forwarder,
which will make the multiple requests required to do the lookup, presumably
over a faster connection than you have yourself.  It will then send a single
reply with the results.

When you go to the root server yourself, you have to do multiple queries
over the slower connection, which takes more time.

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