You have a domain controller named DC1 that runs Windows Server 2008 R2. DC1 is configured as a DNS
server for contoso.com.
You install the DNS server server role on a member server named server1 and then you create a standard
secondary zone for contoso.com. You configure DC1 asthe master server for the zone.
You need to ensure that Server1 receives zone updates from DC1.
What should you do

A.
On DC1, modify the permissions of contoso.com zone.

B.
On Server1, add a conditional forwarder.

C.
Add the Server1 computer account to the DNsUpdateProxy group.

D.
On DC1, modify the zone transfer settings for thecontoso.com zone.

Explanation:
Practically the same question as B/Q1 and K/Q45.
Reference:
http://technet.microsoft.com/en-us/library/cc771652.aspx
Modify Zone Transfer Settings
You can use the following procedure to control whether a zone will be transferred to other servers andwhich
servers can receive the zone transfer.
To modify zone transfer settings using the Windows interface
1. Open DNS Manager.
2. Right-click a DNS zone, and then click Properties.
3. On the Zone Transfers tab, do one of the following:
To disable zone transfers, clear the Allow zone transfers check box.
To allow zone transfers, select the Allow zone transfers check box.
4. If you allowed zone transfers, do one of the following:
To allow zone transfers to any server, click To anyserver.
To allow zone transfers only to the DNS servers that are listed on the Name Servers tab, click Only to
servers listed on the Name Servers tab.
To allow zone transfers only to specific DNS servers, click Only to the following servers, and then add the IP
address of one or more DNS servers.