Security+ Question of the Week: AAA By Guest Authors April 16, 2014 Which of the following is not one of the three features or services commonly referred to as AAA provided by TACACS? A. Authentication B. Availability C. Authorization D. Auditing The correct answer is B. Domain: 5.1. Availability is not one of the three features of AAA. AAA consists of authentication, authorization, and auditing (or accounting). Related Courses Security+ Prep Course (SY0-401) Security+ Certification Boot Camp (SY0-401) In this article CertificationCompTIACybersecuritySecurity+Technologycomptia sec+CompTIA Security+comptia security+ examsecurity+ examsecurity+ exam prep Join the Conversation Cancel Reply Will not be published. Website Notify me of follow-up comments by email. Notify me of new posts by email.