Hi,

>That's for Windows/Exchange 2000.  It doesn't say it will fall back
>though, it says, "Request for Comments (RFC) 883 and the later RFCs
>prescribe that DNS servers be able to accept both TCP virtual circuits
>and UDP."
I couldn't see in that RFC where it stated that it MUST.  You should
note that that RFC was obsoleted by RFC1034 and RFC1035 in 1987 !!!

RFC1035 states:
> While virtual circuits can be used for any DNS activity, datagrams are
> preferred for queries due to their lower overhead and better
> performance.
Which is obviously why M$ chose TCP over UDP - nice, thanks Bill.


                                Neil.

-- 
Neil A. Hillard                E-Mail:   neil at dana dot org dot uk
                               Web:      http://www.dana.org.uk/