The acronym AAA stands for authentication, authorization, and accounting. The AAA framework can be implemented on a Cisco IOS device to provide unified management of access privileges and logs:
- Authentication: This process ensures that when a user enters a username and password combination that it is validated if the user says who they are before access is granted on the system.
- Authorization: After the authentication phase is completed, the second step is to assign privileges to the user's account. The authorization aspects provides privileges for the user and determines what the user can or cannot do on the system.
- Accounting: This is about tracing and tracking the user once he/she logs into the system. Tracking is necessary for the administrator to understand the security measures taken and to perform investigation when a threat or an attack...