Cynthia,

Firstly, because I have to ask, are you aware that creating separate
domains in a forest does not guarantee security and autonomy?  Domains
in Win2k are not the same as domains in NT 4.0.  Synonomous to the
domain in NT 4.0 is the Forest in Windows 2000.

With that said, and moving forward with your question - 

You COULD use a single DNS server in the empty root.  Each domain that
you create CAN register its domain in the single server, but - by all
means - have a minimum of two DCs in that domain and AD integrate the
DNS data.  

Or, it is entirely feasible to have an AD integrated DNS for EACH
domain. Letting each domain control it's own DNS is not a bad move
either.  It's not like DNS is a hugely taxing process.  Choose to
forward the two 'user' domains to the empty root DNS, then forward out
from there to the Internet, thereby controlling your points of access.

Feel free to e-mail directly if you have more pointed questions.

Rick Kingslan - Microsoft Certified Trainer
  MCSE+I on Windows NT 4.0
  MCSE on Windows 2000
  MVP [Windows NT/2000 Server]
  
  mailto:[EMAIL PROTECTED]

"Any sufficiently advanced technology
is indistinguishable from magic."
  ---  Arthur C. Clarke


-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]] On Behalf Of Rittenhouse,
Cindy
Sent: Monday, January 14, 2002 10:14 AM
To: [EMAIL PROTECTED]
Subject: [ActiveDir] DNS design in multidomain forest


My question is a little basic for this site, but I am hoping all your
expertise will help me design the most efficient active directory
structure. I currently have 2 NT domains, one for county government, the
other for county police agencies. We plan to create a single forest with
3 trees; an empty root and the 2 existing NT domains. Certain county
agencies need access to police servers, and the police need access to
certain county servers. All users require intranet access, but only
select workstations and users are to have internet access. My quandary
is the placement of DNS servers. Do I create one primary DNS server in
the null root and secondary DNS servers in the other domains, or do I
create a DNS server for each domain and make it active directory
integrated? If DNS is active directory integrated, how do users in
domain 2 locate resources in domains 3. How will I differentiate users
that need internet access from those who do not. We still have hundreds
of NT and 98 clients? I'd like to examine all possible scenarios and the
pros and cons of each. After reading all your entries over the past
several months, I know that if I don't get the DNS setup correct, my
active directory will be a disaster. Currently, workstations from each
domain that need internet get a DNS server that forwards requests hard
coded in the TCP/IP configuration. All others get a local DNS server
that does not forward requests. 

Cynthia Rittenhouse, MCSE, CCNA
LAN Administrator
County of Lancaster

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