What is an example of a security measure against unauthorized physical access?

Monitoring visitor access to sensitive areas is indeed a critical security measure against unauthorized physical access. This approach helps ensure that only individuals with the necessary permissions can access sensitive or restricted zones within an organization. By keeping accurate records of who enters these areas, organizations can deter unauthorized access, track movements within the facility, and quickly identify potential security breaches.

Such monitoring can involve various methods, including badge systems, visitor logs, surveillance cameras, and security personnel. These measures not only enhance physical security but also contribute to overall organizational safety and integrity by protecting sensitive information and assets.

The other choices do not effectively protect against unauthorized access; for instance, allowing open access contradicts the principles of security, combining job roles can lead to conflicts of interest, and sharing passwords compromises individual accountability and security measures.