CREST Practitioner Security Analyst (CPSA) Practice 2026 - Free CPSA Practice Questions and Study Guide

TACACS stands for Terminal Access Controller Access-Control System and is primarily used in the context of remote authentication. It is a protocol that provides centralized authentication, authorization, and accounting management for users who access networked resources. TACACS allows organizations to manage user access to devices and services securely, which is critical for maintaining the integrity and security of network systems.

While other options relate to different networking aspects, they do not encompass the primary function of TACACS. For example, video conferencing, file transfers, and mail services involve different protocols and services that do not specifically address user authentication needs like TACACS does. Understanding the significance of TACACS in remote authentication helps reinforce the importance of security protocols in managing access to network resources effectively.