Some questions about bind
Brent Bolin
brentbolin at hotmail.com
Tue May 4 14:07:35 UTC 2004
Barry Margolin <barmar at alum.mit.edu> wrote in message news:<c76848$1gfs$1 at sf1.isc.org>...
> In article <c76115$17dd$1 at sf1.isc.org>,
> brentbolin at hotmail.com (Brent Bolin) wrote:
>
> > Hello All,
> >
> > 1. When a domain has miltiple name servers listed(whois) what name
> > server does it use. Does it do round-robin or does it use the first
> > listed name server ?
>
> Client servers keep track of the response times of the servers, and use
> the one with the best times. If there are several servers with similar
> response times, they'll be chosen essentially randomly.
>
> The order of the nameserver listing is irrelevant. The only records
> that impose any kind of priority ordering are the ones that have an
> explicit priority value in the record, e.g. MX records.
>
> > 2. If someone is trying to get to a name address and the first name
> > server does not have it listed will bind try the next authoritative
> > name server for that domain or does it stop at the first name server ?
>
> Failover only occurs when a server doesn't respond. As long as the
> server responds authoritatively, its answer will be used. If it says
> the name doesn't exist, it will be believed.
tku for your response
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