What is the main function of a domain controller?

The main function of a domain controller is to authenticate and authorize users and computers within a Windows domain. This role is crucial in managing security within a network. When a user attempts to log in to a computer or access resources in a Windows domain, the domain controller verifies the user’s credentials against the stored directory data.

Once the user is authenticated, the domain controller authorizes access to resources based on the permissions assigned to that user account. This centralizes security management and enables seamless resource sharing across the network.

In addition to authentication, a domain controller also maintains the database of user accounts and security policies, allowing for effective user management and safeguarding organizational data.

Understanding the role of the domain controller is essential for IT professionals, as it plays a fundamental part in maintaining network security, managing user accounts, and ensuring compliance with organizational policies.