Which of the following is considered a physical security control?

Physical security controls are measures that protect the physical assets of an organization from unauthorized access, damage, or interference. Access control systems, including locks and security cameras, are quintessential examples of physical security controls. They help to regulate who can enter certain physical areas and monitor for any unauthorized access.

Locks serve to physically restrict entry to buildings or secure areas, while security cameras provide surveillance, enhancing security by offering visibility into activities in and around premises. Together, these measures help ensure the physical security of facilities and the assets within them, making them essential components of a comprehensive security strategy.

In contrast, network firewalls, password policies, and data encryption techniques focus on protecting digital assets and information systems rather than the physical environment. Thus, the choice highlighting access control systems represents a clear example of physical security control.