What constitutes a network in the context of building control systems?

In the context of building control systems, the definition of a network extends beyond just controllers to encompass a variety of interconnected devices that facilitate communication and data exchange. The correct choice emphasizes the inclusion of workstations, field panels, and printers; these components work together to create a cohesive system that allows for effective monitoring and control of building operations.

Having a collection of these components connected for communication enables the centralization of data and control functions, allowing operators to manage building systems efficiently. This interconnected approach is fundamental in creating a responsive and integrated control environment, which is pivotal for optimizing building performance, enhancing security, and maintaining comfort levels.

In contrast, the other options may not represent a true network within the context. For example, a group of controllers only would not provide the breadth of functionality a complete network offers, while a single workstation with internet access excludes critical components necessary for building control dynamics. Lastly, a system of independent devices without connections fails to meet the definition of a network since the essence of a network lies in the ability of devices to communicate and function together. Thus, option B accurately captures the comprehensive nature of what constitutes a network in building control systems.