You deploy an Active Directory domain named contoso.com to the network. The domain is configured as
an Active Directory-integrated zone. All domain controllers run Windows Server 2012 and are DNS
servers.
You plan to deploy a child domain named operations.contoso.com.
You need to recommend changes to the DNS infrastructure to ensure that users in the operations
department can access the servers in the contoso.com domain.What should you include in the recommendation?

A.
A zone delegation for _msdcs.contoso.com

B.
Changes to the replication scope of contoso.com

C.
Changes to the replication scope of _msdcs.contoso.com

D.
Changes to the replication scope of operations.contoso.com

Explanation:
The contoso.com resources must be available from the subdomain operations.contoso.com. The
contoso.com replication scope must include operations.contoso.com.
Incorrect:
Not A: Zone delegation relates to which users can handle the administration of a subdomain, but the
question is related to access of servers not of administration of a DNS zone.
Note: Zone delegation is transferring authority for a subdomain to a new zone. Typically, you use zone
delegation when a business unit in an organization is large enough to warrant its own subdomain and
has the personnel to manage its own DNS server for the subdomain.
Not C: Every Windows domain zone has an _mcdcs subdomain, which holds all the SRV records for
Microsoft-hosted services, such as the global catalog, LDAP, and Kerberos.