Which Active Directory role is described as a single DC responsible for processing RID pool requests from all DCs within a domain?

Which Active Directory role is described as a single DC responsible for processing RID pool requests from all DCs within a domain?

• A. PDC Emulator
• B. Domain Naming Master
• C. RID Master
• D. Cloud Server

Answer: (C)

The key idea is that a single RID Master handles all RID pool allocations for the domain. Every domain controller requests a block of Relative Identifiers (RIDs) from this role, which the DC then uses to assign unique SIDs to new objects it creates. Because there’s only one RID Master for the domain, all DCs rely on that authority to ensure every object gets a unique identifier, avoiding duplicates across the domain. If the RID Master is unavailable or out of RIDs, new objects can’t be created until a pool is obtained or the role comes back online. Other roles don’t manage RID distribution—PDC Emulator deals with password changes, time synchronization, and some legacy behavior; Domain Naming Master handles changes to the forest’s domain namespace; and Cloud Server isn’t an Active Directory FSMO role.

The key idea is that a single RID Master handles all RID pool allocations for the domain. Every domain controller requests a block of Relative Identifiers (RIDs) from this role, which the DC then uses to assign unique SIDs to new objects it creates. Because there’s only one RID Master for the domain, all DCs rely on that authority to ensure every object gets a unique identifier, avoiding duplicates across the domain. If the RID Master is unavailable or out of RIDs, new objects can’t be created until a pool is obtained or the role comes back online. Other roles don’t manage RID distribution—PDC Emulator deals with password changes, time synchronization, and some legacy behavior; Domain Naming Master handles changes to the forest’s domain namespace; and Cloud Server isn’t an Active Directory FSMO role.