Your network contains an Active Directory domain named contoso.com. All servers run
Windows Server 2012 R2.Client computers run either Windows 7 or Windows 8.
All of the computer accounts of the client computers reside in an organizational unit (OU)
named Clients. A Group Policy object (GPO) named GPO1 is linked to the Clients OU. All of
the client computers use a DNS server named Server1.
You configure a server named Server2 as an ISATAP router. You add a host (A) record for
ISATAP to the contoso.com DNS zone.
You need to ensure that the client computers locate the ISATAP router.
What should you do?

A.
Run the Set-DnsServerGlobalQueryBlockListcmdlet on Server1,

B.
Configure the Network Options Group Policy preference of GPO1.

C.
Run the Add-DnsServerResourceRecordcmdlet on Server1.

D.
Configure the DNS Client Group Policy setting of GPO1.

Explanation:
The Set-DnsServerGlobalQueryBlockList command will change the settings of a global
query block list which you can use to ensure that client computers locate the ISATAP router.
References:
Training Guide: Installing and Configuring Windows Server 2012 R2, Chapter 4: Deploying
domain controllers, Lesson 4: Configuring IPv6/IPv4 Interoperability, p. 254-256
http://technet.microsoft.com/en-us/library/jj649942(v=wps.620).aspx
http://technet.microsoft.com/en-us/library/jj649876(v=wps.620).aspx
http://technet.microsoft.com/en-us/library/jj649874.aspx
http://technet.microsoft.com/en-us/library/jj649909.aspx