What are three common types of access control devices?

The identification of common types of access control devices encompasses various tools used to regulate entry to secure areas. Locking hardware, entry devices, and exit devices form a comprehensive category of access control measures.

Locking hardware is critical as it includes traditional and modern types of locks that physically secure doors and access points. Entry devices, such as card readers or keypads, are essential for allowing users to gain authorized access, while exit devices are designed to enable smooth egress from a secured area, sometimes without needing to use a key or code, ensuring quick and safe exit.

In this context, the other options present items that may not directly align with the definition of access control devices. For instance, keypads, biometrics, and cameras can be part of larger systems but do not solely encapsulate access control devices as described. Similarly, while smart locks, RFID, and keypads are indeed access control mechanisms, they might not cover the broader scope of access control devices as effectively as the combination of locking and entry/exit devices. Lastly, barriers, turnstiles, and locks, while relevant to security, also reflect physical deterrence methods rather than the full suite of access control systems. Therefore, the chosen answer provides a precise classification of access control