Your network contains an Active Directory forest. The forest contains a single domain named
contoso.com. The domain contains four domain controllers.
The domain controllers are configured as shown in the following table.
All domain controllers are DNS servers.
You plan to deploy a new domain controller named DC5 in the contoso.com domain.
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.
DC1
B.
DC2
C.
DC3
D.
DC4
Explanation:
In order to add a Domain Controller to corp.contoso.com, you need PDC and RID of that domain, not
of the root domain. The Domain Naming Master is needed to add, remove and rename domains in
the forest, i.e. not for individual Domain Controllers.
RID – 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.
https://support.microsoft.com/en-us/kb/223346
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D RID master
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In the exam, the RID and PDC were on the same DC.
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D is correct
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Likewise, when attempting to add new objects in AD DS, such as users, computers, or domain controllers, you might notice event ID 16650 in the
System log indicating that the object cannot be created because the directory service was unable to allocate a relative identifier.
Network connectivity to the RID master might have been lost or the RID master might have been removed from the network.
https://technet.microsoft.com/en-us/library/cc780487(v=ws.10).aspx
The RID master role and the PDC emulator master role should be owned by the same domain controller in the domain.
https://technet.microsoft.com/en-us/library/dd391860(v=ws.10).aspx
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Wouldn’t the PDC would need to be online in order get the correct time, so Kerberos would work, in order to join the domain, before you even get the chance to promote the system to a DC?
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