LONtalk is a communication network similar to which standard used in building automation?

LONtalk is a communication network similar to which standard used in building automation?

• A. MODBUS
• B. HMI
• C. BACnet
• D. Ethernet

Answer: (C)

LONtalk is a building-automation networking approach designed to let devices from different manufacturers communicate together in a reliable way. The standard that serves a similar purpose in building automation is BACnet, which defines how data is exchanged and interpreted across HVAC, lighting, security, and other building systems to achieve true vendor interoperability. Because both BACnet and LonTalk/LonWorks aim to enable cross‑vendor communication in buildings, LONtalk is conceptually similar to BACnet. The other options aren’t a direct match for this role: MODBUS is more of an industrial fieldbus protocol; HMI refers to the user interface for operators, not a communication standard; Ethernet is a general networking transport, not a built-in building-automation standard.

LONtalk is a building-automation networking approach designed to let devices from different manufacturers communicate together in a reliable way. The standard that serves a similar purpose in building automation is BACnet, which defines how data is exchanged and interpreted across HVAC, lighting, security, and other building systems to achieve true vendor interoperability. Because both BACnet and LonTalk/LonWorks aim to enable cross‑vendor communication in buildings, LONtalk is conceptually similar to BACnet.

The other options aren’t a direct match for this role: MODBUS is more of an industrial fieldbus protocol; HMI refers to the user interface for operators, not a communication standard; Ethernet is a general networking transport, not a built-in building-automation standard.