1.2.7. AAA RADIUS

The AAA concept refers to Authentication, Authorization, and Accounting, which are three fundamental principles used in Network Access Control (NAC).

  1. Authentication: The process of verifying the identity of a user, device, or system that attempts to access a network resource.

  2. Authorization: The process of determining whether a user, device, or system has the necessary permissions to access a specific resource on the network.

  3. Accounting: The process of tracking and recording the usage of network resources by users, devices, or systems, which helps in billing and auditing purposes.

The figure below represents the AAA flow:

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