A Domain Controller (DC) is a critical server in a Windows-based network that manages security and permissions for all computers within the domain.
- Centralized Management – A Domain Controller is a server that responds to security authentication requests within a Windows Server domain. It holds a copy of the Active Directory database, which includes information about user accounts and the security of the network.
- Active Directory – This is a directory service used by the Domain Controller to store information about objects in the network, such as users, computers, and other devices. It helps in managing these objects and their access permissions.
- User Authentication – When you log into a computer in a domain, the Domain Controller authenticates your username and password against stored information in Active Directory. If the credentials match, you are granted access to the network resources.
- Security Policies – Domain Controllers enforce security policies across the network, ensuring that all computers and users adhere to the organization’s security requirements. This includes password policies, account lockout policies, and more.
- Replication – In larger networks, multiple Domain Controllers can be set up to ensure redundancy and load balancing. These DCs replicate the Active Directory data among themselves to maintain consistency.
