Authentication, authorization, and accounting are the functional components, but they also contain certain core components. It's important to understand the core components of AAA and their functions, which are as follows:
- Client: A device that attempts to access the network by authenticating itself or acting as substitute to validate the user.
- Policy Enforcement Point (PEP): It implements the requisites specified by client access. It is also referred to as the authenticator, VPN concentrator, Wireless Access Point (WAP), and so on.
- Policy Information Point (PIP): It stores information and facilitates access decisions. A PIP could be a database containing device IDs, a user directory, or a one-time password, to name a few.
- Policy Decision Point (PDP): It is responsible for collecting access requests from the PEP and also assigning the PIP to collect more...