Internet TCP port 478 is commonly used by the BACnet (Building Automation and Control networks) protocol. BACnet is a communications protocol for Building Automation and Control Networks that leverage the ASHRAE, ANSI, and ISO 16484-5 standard protocol. It is primarily used in systems that manage and control heating, ventilating, and air-conditioning control (HVAC), lighting control, access control, and fire detection systems. Examples of software that use this port include the Honeywell WEBs-AX, Tridium Niagara AX, and Delta Controls enteliWEB.
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