Which of the following best describes Physical Security?

Physical security is fundamentally concerned with protecting facilities, equipment, and assets from physical actions and events that could cause damage or unauthorized access. The appropriate definition encompasses the implementation of physical measures such as locks, security personnel, surveillance systems, and access controls that ensure that classified equipment and sensitive information remain secure from unauthorized access.

The focus on safeguarding classified equipment is key because it ensures that only authorized individuals can access critical assets, thereby preventing theft, sabotage, or other malicious acts that could compromise the integrity and confidentiality of the information and technology in use. This is particularly significant in environments where security is paramount, such as government facilities, military bases, or corporate environments where proprietary data and equipment are involved.

The other provided options do not address the concept of physical security. Measures to increase communication speed, enhance battery life, or maintain equipment are more related to operational efficiency and performance rather than the protection and security of physical assets and facilities.