Name one type of physical security control.

Fencing or barriers represent a fundamental type of physical security control. These measures are designed to provide a physical deterrent against unauthorized access to facilities or sensitive areas. The presence of fences or barriers can effectively restrict access to a defined perimeter, enhancing the overall security posture by preventing intrusion from unauthorized individuals.

Additionally, these physical controls can be supplemented with technology such as surveillance cameras or alarm systems, but the primary function of fencing or barriers is to create a physical boundary. This is crucial in protecting critical infrastructure, sensitive data centers, or any locations that require a controlled access environment.

In contrast, the other options do not pertain to physical security controls. Computer software primarily deals with digital security measures rather than physical barriers. Virtual meetings and marketing strategies focus on communication and business operations, which do not employ physical defenses to safeguard spaces or assets. Therefore, fencing or barriers stands out as the appropriate choice in the context of physical security controls.