Your network contains an Active Directory forest. The forest contains one domain and three
sites. Each site contains two domain controllers. All domain controllers are DNS servers.
You create a new Active Directory-integrated zone.
You need to ensure that the new zone is replicated to the domain controllers in only one of
the sites.
What should you do first?

A.
Modify the NTDS Site Settings object for the site.

B.
Modify the replication settings of the default site link.

C.
Create an Active Directory connection object.

D.
Create an Active Directory application directory partition.

Explanation:
Practically the same question as A/Q50 and K/Q17, different set of answers.
To control which servers get a copy of the zone we have to store the zone in an application
directory partition.
That application directory partition must be created before we create the zone, otherwise it
won’t work. So that’s what we have to do first. Directory partitions are also called naming
contexts and we can create one using ntdsutil.
Here I tried to create a zone with dnscmd /zoneadd. It failed because the directory partition I
wanted to use did not exist yet. To fix that I used ntdsutil to create the directory partition
dc=venomous,dc=contoso,dc=com.
Note that after creating it a new naming context had been added. Then, after a minute or
two, I tried to create the new zone again, and this time it worked.

Reference 1)
http://technet.microsoft.com/en-us/library/cc725739.aspx
Store Data in an AD DS Application Partition
You can store Domain Name System (DNS) zones in the domain or application directory
partitions of Active
Directory Domain Services (AD DS). An application directory partition is a data structure in
AD DS that distinguishes data for different replication purposes. When you store a DNS
zone in an application directory partition, you can control the zone replication scope by
controlling the replication scope of the application directory partition.
Reference 2)
http://technet.microsoft.com/en-us/library/cc730970.aspx
Partition management
Manages directory partitions for Active Directory Domain Services (AD DS) or Active
Directory Lightweight
Directory Services (AD LDS).
This is a subcommand of Ntdsutil and Dsmgmt.
Examples
To create an application directory partition named AppPartition in the contoso.com domain,
complete the following steps:
1. To open an elevated Command Prompt window, click Start, point to All Programs, click
Accessories, rightclick
Command Prompt, and then click Run as administrator.
2. Type: ntdsutil
3. Type: Ac in ntds
4. Type: partition management
5. Type: connections
6. Type: Connect to server DC_Name
7. Type: quit
8. Type: list
The following partitions will be listed:
0 CN=Configuration, DC=Contoso, DC=com
1 DC=Contoso, DC=com
2 CN=Schema, CN=Configuration, DC=Contoso, DC=com
3 DC=DomainDnsZones, DC=Contoso, DC=com
4 DC=ForestDnsZones, DC=Contoso, DC=com
9. At the partition management prompt, type: create nc dc=AppPartition,
DC=contoso,dc=com
ConDc1.contoso.com
10. Run the list command again to refresh the list of partitions.