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 R0DC1.
What should you configure on DC1? To answer, select the appropriate tab in the answer area.
Hot Area:

Answer:

Explanation:
http://technet.microsoft.com/en-us/library/cc781340(v=ws.10).aspx
Foradditional 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.