Your network contains an Active Directory forest. The forest contains two domains named contoso.com and
corp.contoso.com. The forest contains four domain controllers. The domain controllers are configured as
shown in the following table.
All domain controllers are DNS servers. In the corp.contoso.com domain, you plan to deploy a new domain
controller named DC5. You need to identify which domain controller must be online to ensure that DC5 can be
promoted successfully to a domain controller. Which domain controller should you identify?
A.
DC3
B.
DC4
C.
DC2
D.
DC1
I think A) DC3 is correct, even it seems you need Domain Naming Master.
The Domain Naming Master FSMO role is required for adding or removing DOMAINS, not domain controllers. The question is asking about adding domain controllers, not domains.
According to Microsoft: RID
•Allocates active and standby RID pools to replica domain controllers in the same domain.
•Must be online for newly promoted domain controllers to obtain a local RID pool that is required to advertise or when existing domain controllers have to update their current or standby RID pool allocation.