Which option refers to centralized systems which monitor and control industrial sites, or complexes of systems spread out over large areas?

The term that refers to centralized systems designed for monitoring and controlling industrial sites, or complex systems distributed over vast areas, is Supervisory Control and Data Acquisition (SCADA). SCADA systems are essential for operational management in industries such as water treatment, energy, and manufacturing, enabling real-time data collection and control over distributed processes.

These systems allow operators to monitor equipment and processes from a central location, providing important functions such as data acquisition, system control, and real-time visualization of operational parameters. This centralization is crucial for efficient management of resources and timely response to potential issues in geographically dispersed locations.

On the other hand, terms like Joint Operability network, Tactical data links network, and Strategic data control network do not accurately describe this function in the context intended. They relate more to different aspects of military communications and data sharing rather than the specific control and monitoring functions provided by SCADA systems in industrial applications.