Which of the following best defines "physical security" in the DoD context?

In the context of the Department of Defense, "physical security" refers to the comprehensive measures and strategies implemented to safeguard personnel, facilities, and equipment from various physical threats such as unauthorized access, natural disasters, and hostile actions. This encompasses a wide range of techniques including access control, surveillance systems, secure facility design, and emergency response plans, all aimed at ensuring the safety and protection of tangible assets vital to national security.

The focus on protecting personnel and assets is crucial, as it helps maintain operational integrity and prevents potential breaches that could compromise sensitive missions or information. By prioritizing physical security, the DoD establishes a foundational layer of defense that complements other security measures, such as cyber and information security, ensuring a holistic approach to safeguarding national defense.