AAA and User Management Overview
AAA provides security functions for user authentication, authorization, and accounting.
AAA
Authentication, Authorization, and Accounting (AAA) refers to a combination of security-related technologies used to authenticate and authorize users, as well as to account for the service provided to the users.
- Authentication: checks whether a user has the rights to access the network.
- Authorization: authorizes a user so that the user can use a specified service.
- Accounting: records the usage of network resources for charging purposes.
AAA uses the client/server model. This model features good extensibility and facilitates centralized management over user information, as shown in Figure 1.
