BPA Computer Security Practice Test 2026 – The Complete All-in-One Guide for Exam Success

TACACS, or Terminal Access Controller Access-Control System, is a protocol used primarily for remote authentication and access control. The correct answer relates to the specific port on which TACACS operates.

Port 49 is designated specifically for TACACS, allowing secure communications between clients and TACACS servers. This protocol is vital in situations where authentication information needs to be managed securely, especially in network devices like routers and switches. By using a dedicated port, TACACS helps ensure that authentication requests are directed correctly and handled securely, thus maintaining the integrity of user data and access privileges.

Understanding the function of TACACS and the specific port it utilizes is crucial for properly configuring network devices and ensuring robust security protocols are in place.