CyberCertPrepOT Security FundamentalsOT Fundamentals: Network Architecture & ProtocolsEASYFree question
A new engineer asks why Modbus is still found in 30-year-old plants. Which property best explains its longevity?
- A.Built in mutual authentication that modern vendors trust
- B.Native publish subscribe messaging secured with certificates
- C.Hardware enforced encryption in each UART chip
- D.A simple open specification that is cheap to implement
Why D is correct
Modbus is royalty-free and trivial to implement on tiny devices, which is why it persists. It has no authentication, no encryption, and no publish subscribe model.
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