What is the purpose of an access control system?

• A. To Monitor Parking Lots
• B. To Allow Authorized Entry and Prevent Unauthorized Entry to a Controlled Area
• C. To Track Inventory
• D. To Communicate with Security Staff

Answer: (B)

Access control systems are about regulating who can enter or exit a restricted space. Their primary purpose is to enforce permissions by verifying credentials (like cards or biometrics), determining whether the person has authorization for that area, and then unlocking or keeping the door locked accordingly. This active gatekeeping helps prevent unauthorized access while allowing legitimate personnel to move where they’re allowed. It also often provides a record of who used which door and when, which supports accountability and incident response.

Other options describe useful security activities, but they aren’t the core function of an access control system. Monitoring parking lots is a surveillance task, tracking inventory is asset management, and communicating with security staff is part of operations—areas that support security but aren’t the system’s primary purpose of controlling access to a controlled area.