Active Directory is best described as:

• A. A database and set of services that connect users to a domain network
• B. A web server for hosting internal sites
• C. A tool for video streaming
• D. A data backup service

Answer: (A)

Active Directory is Microsoft’s directory service that stores information about network resources—users, groups, computers, printers—in a central database and provides the services that handle authentication and authorization across a Windows domain. In practice, it manages identities and access, so users can log on to the domain and access resources they’re permitted to use, while administrators enforce security policies and permissions through tools like Group Policy. It’s not a web server, video streaming tool, or backup service; its primary role is to organize and control who can do what within a domain-based network, using components such as domain controllers, LDAP for querying the directory, Kerberos for authentication, and DNS for locating services.