This e-book explains why patching alone cannot adequately protect IoT-heavy environments where medical, facilities, industrial, and other unmanaged devices may be unpatchable, vendor-controlled, operationally critical, or too disruptive to take offline. It identifies six segmentation challenges: patching cannot keep up, incomplete asset visibility, unclear ownership, disconnected visibility and enforcement tools, excessive implementation complexity, and attempts to segment everything at once. Recommended practices include continuous passive discovery, contextual device classification, behavioral baselining, collaboration around shared uptime and risk goals, linking asset intelligence with NAC and firewall enforcement, policy simulation, automation, and phased deployment. The guide advocate

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