industrial control systems reference architecture · scada, dcs, plc, ems systems level 5 internet...
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Industrial Control Systems Reference Architecture
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SCADA, DCS, PLC, EMS Systems
Level 5Internet DMZ
Level 4Enterprise LAN
Level 3.5Enterprise DMZ
Level 3Operations DMZ
Level 2Supervisory LAN
Level 1Controller LAN
Level 0Instrumentation Bus Network