HOTSPOT
Your network contains an Active Directory domain named adatum.com. All servers run
Windows Server 2012 R2. All domain controllers have the DNS Server server role installed.
You have a domain controller named DC1.
On DC1, you create an Active Directory-integrated zone named adatum.com and you sign
the zone by using DNSSEC.
You deploy a new read-only domain controller (RODC) named R0DC1.
You need to ensure that the contoso.com zone replicates to RODC1.
What should you configure on DC1?
To answer, select the appropriate tab in the answer area.
Answer: 
Explanation:
http://technet.microsoft.com/en-us/library/cc781340(v=ws.10).aspx
For additional servers to host a zone, zone transfers are required to replicate and
synchronize all copies of the zone used at each server configured to host the zone.
I agree