Name one physical security measure that can help prevent unauthorized access.

Implementing security cameras or access control systems is a powerful measure for preventing unauthorized access. Security cameras serve as a deterrent, as their presence can discourage potential intruders from attempting to gain access to restricted areas. Additionally, they provide a way to monitor and record activity, allowing for investigations after incidents occur.

Access control systems work by limiting entry to authorized personnel only. These systems can include keycards, biometric scanners, or keypad entry systems. They help ensure that only individuals with the proper credentials can enter specific locations, thereby significantly enhancing the security of a facility. Together, these physical measures create a robust defense against unauthorized access.

In contrast, while fire extinguishers are essential for safety and can prevent fire damage, they do not directly relate to preventing unauthorized access. Office cleaning supplies are necessary for maintaining cleanliness but do not have any security implications. Employee ID badges, while useful for identification, may not be as effective in controlling access without a supporting system like access controls, making them less comprehensive on their own.