Implementing Purdue Model Network Segmentation When to Use - When designing or retrofitting network architecture for an ICS/SCADA environment - When implementing IEC 62443 zone and conduit requirements in a brownfield plant - When creating the IT/OT DMZ (Level 3.5) to control data flow between enterprise and control networks - When remediating audit findings about flat OT networks or direct IT-to-OT connectivity - When segmenting a converged IT/OT network after an acquisition or merger Do not use for micro-segmentation within a single Purdue level (see implementing-zone-conduit-model-for-ics)…