Your network contains an Active Directory forest named contoso.com. The forest contains two domains named contoso.com and child.contoso.com. The forest
contains two domain controllers. The domain controllers are configured as shown in the following table.
You need to ensure that DC2 can provide authoritative responses for queries to the contoso.com namespace.
What should you do?
A.
On DC2, create a forwarder.
B.
On DC1, create a delegation.
C.
On DC1, change the replication scope of the contoso.com zone.
D.
On DC2, modify the Zone Transfers settings.
Explanation from other version:
DC2 is in a child domain of the domain supported by DC1, DC1 is automatically authoritative for the child.contoso.com namespace as it is the child of the domain it supports. However for DC2 in the child domain to be authoritative for the parent domain, a delegation must be created on that domain (i.e. on DC1) for this to happen
http://www.aiotestking.com/microsoft/you-need-to-ensure-that-dc2-can-provide-authoritative-responses-for-queries-to-the-contosocom-namespace-3/
Why not C
“On DC1, change the replication scope of the contoso.com zone.” ??
replication scope is where the DNS database will be stored, ie to other DNS Servers and DC2 is not a DNS Server so can rule option c out..