Explain how SCADA differs from DCS.

What will be an ideal response?

A supervisory control and data acquisition (SCADA) system is a subset of ICS. Generally, a SCADA system has the same basic components as a DCS, but differs in two very important ways. First, a SCADA system is designed for large-scale, distributed processes such as power grids, pipelines, and railroads. Second, due to the distance involved, a SCADA system must function with the idea that remote devices may or may not have ongoing communication with the central control.