TACACS

(Terminal Access Controller Access Control System) An access control protocol used to authenticate a user logging into the network. TACACS is a simple username/password system. Extended TACACS (XTACACS) adds more intelligence in the server, and TACACS+ adds encryption and a challenge/response option. See challenge/response.

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In addition, it features Quality of Service (QoS) with four levels of priority to ensure smooth transmission of key data, IGMP Snooping and Multiple Spanning Tree, and supports security features such as RADIUS and IEEE802.1x, SSH, SSL and TACACS.

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No matter how he or she dials in, a user's authentication request is routed to the authentication server, which supports both RADIUS and TACACS remote access protocols.

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