This eBook explores how smart buildings and connected facilities expand the cyber attack surface as IoT devices, building automation systems, and OT networks converge with IT. It explains why traditional IT security alone is insufficient for OT environments and outlines practical protections such as network segmentation, device-level authentication, zero-trust architectures, and secure gateways. Through real-world case examples—energy management in public buildings, 24/7 fitness centers, and school districts—the document shows how device-level cybersecurity can protect legacy systems, improve resilience, reduce risk, and maintain safe, efficient building operations without disrupting existing infrastructure.

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