This Operational Technology (OT) Cybersecurity white paper outlines the convergence of OT and IT in the wake of the Fourth Industrial Revolution, where critical infrastructure sectors face increasing cyber threats. As air-gapped systems become digitally integrated, risk exposure grows. Fortinet presents a framework to secure these environments through a unified security fabric, highlighting five best practices: asset identification and prioritization, network segmentation, traffic analysis, access control, and securing wired/wireless endpoints. The guide aligns these practices with industry regulations and the Purdue Model, enabling safer, smarter digital transformation.

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