Which of the following is a FSMO role in Active Directory Domain Services?

• A. Global Catalog
• B. Domain Naming Master
• C. Schema Master
• D. Active Directory Administrative Center

Answer: (C)

In Active Directory, certain operations are handled by single domain controllers called FSMO roles to prevent conflicts. The Schema Master is one of these roles and has a very specific job: it controls all updates to the forest’s schema, which defines what objects and attributes can exist in AD. Only the Schema Master can modify the schema, and those changes propagate to all domain controllers in the forest. That makes it the right choice among the options, because it is the role that directly enforces single-master schema changes.

The Global Catalog isn’t a FSMO role; it’s a specialized directory that holds a partial, searchable index of objects from all domains to speed up searches and logon across forests. The Domain Naming Master is another FSMO role, but it pertains to adding and removing domains in the forest, which is a different, broader function. The Active Directory Administrative Center is a management GUI, not a role.