Which of the following defines a private office fixed post?

A private office fixed post is characterized by the presence of essential security infrastructure, including communications equipment and closed-circuit television (CCTV) monitors. This setting typically allows personnel to monitor surveillance feeds, manage communications, and respond to incidents effectively. By having these tools readily available, security personnel stationed at a private office fixed post can efficiently oversee the premises and ensure a swift response to any security concerns or incidents that may arise.

The other options, while potentially describing different types of security posts, do not encapsulate the specific characteristics of a private office fixed post. For example, while certain posts may involve visitor checks or be located at entry points, a private office fixed post specifically emphasizes the technology and equipment used for comprehensive surveillance and communication.