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Training Camp • Cybersecurity Glossary
Modbus is a widely used industrial control protocol for PLCs and SCADA, available as RTU, ASCII, and TCP, with no native security.
Modbus Definition: Modbus is a widely used industrial control protocol for PLCs and SCADA, available as RTU, ASCII, and TCP, with no native security.
Modbus is an open serial and TCP-based communication protocol introduced in 1979 and widely used in industrial control systems to exchange data between PLCs, sensors, and SCADA masters. Common variants include Modbus RTU and ASCII over serial lines and Modbus TCP over Ethernet; the protocol lacks built-in authentication or encryption, making it a frequent OT security concern.
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