A control system, particularly in the context of IACS, is defined as a collection of hardware and software components used to monitor and control industrial processes. This includes PLCs, RTUs, SCADA software, HMIs, and communication networks.
“Control system: A set of hardware and software components that work together to monitor and control industrial or process operations.”
— ISA/IEC 62443-1-1:2007, Clause 3.3.5 – Terminology
While the other options describe security functions or consequences, only Option C accurately describes what a control system is.
[References:, ISA/IEC 62443-1-1:2007 – Clause 3.3.5, ISA/IEC 62443-2-1 – Asset definitions, ===========, , , , , , ]
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