What authentication service was developed by cisco and is an authenticatrion service commonly used on unix devices that communciate by forwarding user authentication information to a centralized server?

Cisco developed the Terminal Access Controller Access- Control System that controls remote authentication and related services for the network. Terminal Access Controller used for communication with UNIX networks. It has an extension, which is also introduced by Cisco Systems.

Terminal Access Controller Access-Control System

Explanation:

TACACS is introduced by Cisco in 1990 and remotely access to communicate with an authentication server to determine the access of the network.

TACACS+ is also a protocol released in 1993 as an open standard that also handles authentication, authorization, and accounting services.

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