What is a domain controller active directory

A Domain Controller (DC) is a server computer used in a Windows Server environment to handle security authentication and authorization within a domain. An Active Directory (AD) is a directory service created by Microsoft, used to store information and provide centralized authentication, authorization, and directory services for Windows-based networks.

The Role of a Domain Controller #

A Domain Controller authenticates and authorizes all users and machines in a Windows Domain network granting access to the resources of that network. It also stores profiles, group policies, contact details, user passwords as an encrypted form, provides secure authentication for user logins, emails, and other applications.

Active Directory Overview #

Active Directory is a directory service for Windows-based networks that runs on Windows Server. Active Directory stores data as objects that users and administrators manipulate using a set of APIs, scripts, and graphical user interface (GUI) elements. It manages all network security settings and offers users secure log-on authentication.

It also provides a common structure to organize and manage resources on large networks, and provides administrators with tools to design, manage, and analyze objects within the directory.

How Domain Controllers Retrieve Information #

To authenticate users, Domain Controllers retrieve the relevant information from the Active Directory database. Different types of Domain Controllers such as Global Catalog, Read-Only, and Writable Domain Controllers interact with the Active Directory database in different ways.

  • Global Catalog: This type of Domain Controller provides global access to the Active Directory database and contains a subset of all objects in the directory. It responds to requests originating outside the domain.
  • Read-Only: This type of Domain Controller allows a user to view limited information from the Active Directory database but does not allow for any modifications.
  • Writable Domain Controller: This type of Domain Controller allows a user to both view and modify information from the Active Directory.

Conclusion #

A domain controller Active Directory is a server computer used in a Windows Server environment to securely store and manage a range of resources and authentication details. It also provides a common structure for users and administrators to manage and analyze resources within the directory database.