ICS-SCADA Exam Dumps | Which of the following ports are used for communications in Modbus TCP?

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Fortinet.ICS-SCADA.v2024-08-06.q36
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Question 7/36

Which of the following ports are used for communications in Modbus TCP?

A. 205

B. 405

C. 505

D. 502

Correct Answer: D

Modbus TCP is a variant of the Modbus family of simple, networked protocols aimed at industrial automation applications. Unlike the original Modbus protocol, which runs over serial links, Modbus TCP runs over TCP/IP networks.
Port 502 is the standard TCP port used for Modbus TCP communications. This port is designated for Modbus messages encapsulated in a TCP/IP wrapper, facilitating communication between Modbus devices and management systems over an IP network.
Knowing the correct port number is crucial for network configuration, security settings, and troubleshooting communications within a Modbus-enabled ICS/SCADA environment.
Reference
Modbus Organization, "MODBUS Application Protocol Specification V1.1b3".
"Modbus TCP/IP - A Comprehensive Network protocol," by Schneider Electric.

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