Your network contains an Active Directory domain named contoso.com. The domain contains six domain controllers named DC1, DC2, DC3, DC4, DC5, and DC6.
Each domain controller has the DNS Server server role installed and hosts an Active Directory-integrated zone for contoso.com. You plan to create a new Active
Directory-integrated zone named litwareinc.com that will be used for testing. You need to ensure that the new zone will be available only on DC5 and DC6. What
should you do first?
A.
Create an application directory partition.
B.
Change the zone replication scope.
C.
Create an Active Directory connection object.
D.
Create an Active Directory site link.
A. Create an application directory partition.
A partition is a data structure in AD DS that distinguishes data for different replication purposes. When you create an application directory partition for DNS, you can control the scope of replication for the zone that is stored in that partition
http://technet.microsoft.com/en-us/library/cc754292.aspx