Which of the following is a true statement about restricted areas?

The statement that restricted areas must be marked to ensure people know they are restricted is accurate and underscores the importance of clear communication regarding access limitations. Marking restricted areas serves several critical functions: it informs personnel and visitors that they may be entering an area with limited access, helps prevent unauthorized individuals from entering potentially sensitive or hazardous environments, and reinforces the overall security posture of the facility.

In a security context, well-marked restricted areas are integral to the physical security framework, as they aid in controlling access and ensuring that only permitted personnel can enter. Proper signage and physical barriers work together to minimize the risk of unauthorized entry and help protect the assets or operations located within those areas. Hence, marking restricted areas is not just a regulatory requirement, but a best practice that contributes to the safeguarding of sensitive information and environments.