How many FSMO roles exist in an Active Directory forest?

How many FSMO roles exist in an Active Directory forest?

• A. 3
• B. 5
• C. 4
• D. 6

Answer: (B)

Flexible Single Master Operations (FSMO) roles are designations that ensure certain AD tasks are performed by a single authoritative source to prevent conflicts. There are five distinct FSMO roles in an Active Directory forest: two that operate across the entire forest—the Schema Master, which governs updates to the AD schema, and the Domain Naming Master, which coordinates adding or removing domains in the forest; and three that operate within each domain—the RID Master, which assigns unique relative IDs to new objects; the PDC Emulator, which acts as the primary time source, handles password changes, and supports compatibility features; and the Infrastructure Master, which updates cross-domain references for group memberships and other attributes. Because the forest has two forest-wide roles and each domain has its own three domain-wide roles, the total number of FSMO role types is five. The actual number of role holders depends on how many domains exist, but the five role types remain constant.

Flexible Single Master Operations (FSMO) roles are designations that ensure certain AD tasks are performed by a single authoritative source to prevent conflicts. There are five distinct FSMO roles in an Active Directory forest: two that operate across the entire forest—the Schema Master, which governs updates to the AD schema, and the Domain Naming Master, which coordinates adding or removing domains in the forest; and three that operate within each domain—the RID Master, which assigns unique relative IDs to new objects; the PDC Emulator, which acts as the primary time source, handles password changes, and supports compatibility features; and the Infrastructure Master, which updates cross-domain references for group memberships and other attributes. Because the forest has two forest-wide roles and each domain has its own three domain-wide roles, the total number of FSMO role types is five. The actual number of role holders depends on how many domains exist, but the five role types remain constant.