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CompTIA SecurityX CAS-005 · Domain 3: Security engineering

Specialized and legacy systems: OT/ICS/SCADA, IoT, embedded systems and compensating controls

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Last reviewed September 25, 2026 · Leer en español

Not every system can be patched monthly or run an EDR agent. Operational technology (OT), industrial control systems (ICS), building systems, medical devices, IoT and old line-of-business servers often run outdated software, have long lifespans and have strict availability or safety requirements. Security architects protect them mainly by surrounding them with controls.

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