Domain Controller (DC for short) is a server that manages network users, computers and other network resources in the Windows domain. It is an important function of Windows Server operating system, which is used to realize centralized management, authentication and authorization. Domain controller is one of the core components of Windows domain, which allows administrators to centrally manage all network resources and provide users with single sign on credentials.
The main functions of the domain controller include:
1. Authentication and authorization: The domain controller is responsible for verifying the user's identity and authorizing the user's access to resources. When a user logs on to a domain, the domain controller SN74AVC16T245DGGR The user name and password will be verified, and corresponding permissions will be assigned according to the user group or organizational unit (OU) to which they belong. The domain controller can also control access to shared folders, printers and other resources through access control lists (ACLs).
2. User and computer management: Domain controllers allow administrators to centrally manage all user and computer accounts. Administrators can create, modify and delete user accounts, reset passwords, and specify user group members. The domain controller can also manage the computer configuration through group policy, including security policy, software installation, network settings, etc.
3. Centralized management of resources: The domain controller can centrally manage various resources in the network, including shared folders, printers, databases, etc. Administrators can create shared folders on domain controllers and control access to them. The domain controller can also manage printers, allowing users to share printer resources through the network.
4. Directory Service: The domain controller uses Active Directory (AD) as its directory service. Active Directory is a distributed database that stores all objects and their attributes in the domain. The domain controller is responsible for maintaining the integrity and consistency of the Active Directory database, allowing administrators to access and manage objects in Active Directory through LDAP (Lightweight Directory Access Protocol).
The working principle of domain controller is as follows:
1. Domain join: When a computer joins a domain, it needs to specify a domain controller as its authentication server. The computer will establish a security trust relationship with the domain controller and obtain the security policy and group policy of the domain controller.
2. Authentication: When a user logs on to the domain, the computer will send the user name and password provided by the user to the domain controller for authentication. The domain controller will check whether the user name and password match and return the verification result to the computer.
3. Authorization: If the authentication is successful, the domain controller will authorize the user's access to resources according to the user's permissions and group membership.
4. Directory Service: The domain controller periodically synchronizes changes to the Active Directory database with other domain controllers. This ensures the consistency of directory information in the entire domain.
In short, the domain controller is the core server in the Windows domain, responsible for the authentication, authorization, and centralized management of users, computers, and other resources. It provides a secure, centralized and scalable network management solution, which helps to improve network security and management efficiency.
