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Last updated: April 29, 2026
Purdue Model = standard reference architecture for ICS networks. Six levels of segmentation.
Purdue Model = standard reference architecture for ICS networks. Six levels of segmentation.
Levels
- Level 0 — physical process (sensors, actuators)
- Level 1 — basic control (PLCs, RTUs)
- Level 2 — area supervision (HMIs, historians)
- Level 3 — site operations (MES, plant historians)
- Level 3.5 — DMZ between OT and IT
- Level 4-5 — corporate IT, enterprise systems
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