Final answer:
AAA authentication uses various methods like passwords, tokens, or biometrics to ensure network resource security. It represents a framework that encompasses authentication, authorization, and accounting to manage access and policy enforcement.
Step-by-step explanation:
When authenticating with AAA (Authentication, Authorization, and Accounting), you may use one of several methods such as passwords, tokens, or biometrics. AAA is a framework for controlling access to computer resources, enforcing policies, auditing usage, and providing the information necessary to bill for services. These methods ensure only authorized users are allowed access to network resources, and they can be remembered as something you know (a password), something you have (a token), and something you are (biometrics).