how to know what DNS server is being used

Robert Huff roberthuff at
Sat Oct 28 13:13:15 UTC 2006

Chad Leigh -- Shire.Net LLC writes:

>  > On my registrars site I have two DNS servers listing. How would
>  > I know that 1) both are working. 2) which one is being used.
>  For #2, do you mean by the world at large?  Which one is being
>  used when people look up your domain and hosts in your domain?
>  Both of them should get used.  I don't know what algorithm is
>  used but both will be used by people.

	As I understand it, when presented with a list of N>1 possible
nameservers standard resolver libraries will pick one at random and
continue to use it until something changes (nameserver goes
off-line, local cache is flushed, etc.).

				Robert Huff

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