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Many students who study using our platform have reported that a large number of the practice questions here are very similar to those that appear in real exams. View Courses
Many students who study using our platform have reported that a large number of the practice questions here are very similar to those that appear in real exams. View Courses
A security consultant has been asked to recommend a secure network design that would:• Permit an existing OPC server to communicate with a new Modbus server that is controlling electrical relays.
Due to the limitations within the Modbus protocol, which of the following configurations should the security engineer recommend as part of the solution?
The correct answer is: D. Restrict inbound traffic so that only the OPC server is permitted to reach the Modbus server on port 502.
The Modbus protocol uses port 502 for communication. To securely enable communication between the OPC server and the Modbus server while minimizing operational disruptions, the security consultant should:
Why the other options are incorrect:
Restrict inbound traffic so that only the OPC server is permitted to reach the Modbus server on port 135:
Restrict outbound traffic so that only the OPC server is permitted to reach the Modbus server on port 102:
Restrict outbound traffic so that only the OPC server is permitted to reach the Modbus server on port 5000:
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