Brian's description is precisely how NT 4 works. I'd say the same for 2000,
but they effected a lot of scary changes to the networking implementation
during their latest OS rewrite. Shortly after the 1st post appeared, I
verified firsthand (ethereal & a browser: most likely much quicker than the
original poster's online search, and more definitive) that 2000 advanced
server behaves this way, but I don't really have access to other versions of
the 2000 software to test with .

In general, you're more likely to find the type of information the original
poster was seeking in articles about how to use network monitor than their
ip white papers, since packet-capturing tutorials like working with
well-defined examples such as DNS.


----- Original Message -----
From: "Brian Hill" 
To: 
Sent: Monday, May 13, 2002 11:21 PM
Subject: Re: DNS - Unicast or Broadcast? [7:44060]


> Patrick Ramsey wrote:
> >
> > windows clients will actualy send unicast to ALL listed dns
> > servers... Instead of quearying the first, timeout, second,
> > timeout, etc.... They just assume all will time out and send it
> > to all listed.  but it is definately unicast.
> >
> > -Patrick
>
> Patrick,
>
> Unless you can back this up with a sniff or Q article, I am going to
> strongly disagree with this one. To my knowledge, windows clients actually
> just send to the first server listed. If that server NEVER responds, it
> sends to the second. But if that server responds negatively (i.e. "I can't
> find the host"), the client will never query any other servers, due to the
> fact that the other servers SHOULD (assuming root hints and forwarding are
> correctly configured) respond with the same answer.
>
> Brian Hill
> CCNP, CCDP, MCSE 2000 (Charter Member),MCSE+I (NT4.0),
> MCSA (Charter Member), MCP+I, MCP(21), Inet+, Net+, A+
> Lead Technology Architect, TechTrain
> Author: Cisco, The Complete Reference
> http://www.alfageek.com




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