TACACS stands for Terminal Access Controller Access-Control System. Plus sign means a newer and updated version of TACACS. Like RADIUS, TACACS+ also uses AAA framework to provide centralized access into a network.
RADIUS was designed to authenticate and log remote network users, while TACACS+ is used for administrator access to network devices like routers and switches.
TACACS+ servers should be deployed in a fully trusted internal network. No direct access should be allowed from untrusted or semi-trusted networks.
Keywords: AAA, Authentication, Authorization, and Accounting, RADIUS, Remote Authentication Dial-In User Service, Access server, remote access control, TACACS+, Terminal Access Controller Access Control System plus,
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