ICS/SCADA Cybersecurity — Question 9

What type of communication protocol does Modbus RTU use?

Answer options

• A. UDP
• B. ICMP
• C. Serial
• D. SSTP

Correct answer: C

Explanation

Modbus RTU employs a Serial communication protocol, allowing for efficient data transmission over serial lines. The other options, UDP and ICMP, are network layer protocols used for different types of communications, while SSTP is a secure tunneling protocol, none of which are applicable to Modbus RTU.