Your company has a main office and three branch offices. Each office has a server that runs Windows
Server 2008. The server has the DNS Server role installed. The branch offices contain client
computers that run Windows 2000. You plan to deploy Active Directory Domain Services (AD DS) on
the network. You need to plan a name resolution solution for the deployment of Active Directory
Domain Services (AD DS). The solution must meet the following requirements:
Support secure dynamic updates.
Minimize response times for users connecting to resources anywhere on the network.
What should you include in your plan?

A.
A GlobalNames zone for the forest.

B.
A single Active Directory-integrated DNS zone.

C.
A stub zone on the DNS server in each branch office.

D.
A standard primary zone in the main office and secondary zones in each branch office.

Explanation:
To deploy Active Directory Domain Services (AD DS) on the corporate network of the company with
given requirements, you need to implement a single Active Directory-integrated (ADI) DNS zone.
Active Directory integrated (ADI) primary DNS zone enables built-in recovery, scalability, and
performance. An ADI zone is a writeable copy of a forward lookup zone that is hosted on a domain
controller. It can therefore reduce the response times for users connecting to resources anywhere
on the network and because it uses directory-integrated storage it also simplifies dynamic updates
for DNS clients that are running Windows 2000. None of the other options can be used to meet the
desired objectives.
From the Windows 2000 Resource Kit
http://windowsitpro.com/article/articleid/76616/jsi-tip-5312-when-you-change-your-dns-activedirectory-integrated-zone-type-to-secondary-it-changes-back-to-active-directory-integrated-whenyou-restart.html
ACTIVE DIRECTORY ADMINISTRATION TIPS
http://searchwinit.techtarget.com/tip/0,289483,sid1_gci1115858,00.html