What service manages computers within a domain?

• A. LDAP Directory
• B. Group Policy
• C. Domain Controller Service
• D. Active Directory

Answer: (D)

Active Directory is the central directory service that coordinates who can access what and what resources exist in a Windows domain. It runs on domain controllers as Active Directory Domain Services, storing information about computers, users, groups, and policies and handling authentication and authorization across the domain. LDAP is a directory protocol used to read and write directory data, but it isn’t the management service by itself. Group Policy governs configuration settings across domain-joined machines, but it relies on the directory service to target those machines. A term like Domain Controller Service isn’t an official Windows service name; the actual service you rely on is Active Directory Domain Services running on domain controllers.