Building automation runs on the network — but most BAS professionals were never taught how that network actually works. This course closes that gap. You'll master the core IT concepts driving modern BAS: IP addressing, subnets, switching, VLANs, routing, and firewalls, all explained through real BAS scenarios and failure patterns. Go beyond theory to understand how controllers, supervisors, and gateways actually communicate — and why connections break. You'll finish with the practical skills to design, segment, troubleshoot, and secure networked BAS infrastructure, plus a grounding in modern protocols like MQTT and BACnet/IP for scalable, future-ready systems.