Which of the following describes a technical control for physical ports?

The correct answer emphasizes a specific method employed to secure physical ports, which are crucial access points to critical infrastructure. Technical controls focus on using technology and systematic approaches to regulate and monitor access.

The choice related to OS Policy Enforcement refers to the implementation of policy-driven measures at the operating system level that ensure only authorized users and devices can access system resources. This is essential for maintaining the integrity and security of sensitive information and systems. In the context of physical ports, it implies that access is authenticated and controlled through established security protocols that are critical for safeguarding physical environments from unauthorized intrusion.

Signage, while necessary for safety and awareness, does not offer a systematic or technological mechanism for protecting physical ports or managing access. It primarily serves an informational purpose rather than a control function.

Employee training enhances awareness among staff regarding security practices and policies but does not serve as a direct technical control itself. This approach relies on human factors rather than automated or technological measures.

A disaster recovery plan focuses on the strategies to restore operations after an incident and does not act as a proactive control for managing physical access to ports.

Thus, OS Policy Enforcement stands out as the strongest technical control for ensuring the security of physical ports through systematic access regulation.