Question: Attack mechanisms. Consider the two ECUs in the image below starting to transmit at the same time and on the same CAN bus. A rogue

  1. Attack mechanisms.
  1. Consider the two ECUs in the image below starting to transmit at the same time and on the same CAN bus. A rogue ECU (X) connects to the same CAN bus. What is the highest identifier the attacker controlling the rogue ECU could choose and still block all other nodes from transmitting. How would it block them?
[10 marks]
  1. The image below shows an example DNP3 topology for the control of RTUs in an industrial control environment. RTU 2 does not seem to respond to regular polling by the master. Provide four possible reasons for this and how could you test for each one? Use any reasonable assumptions where necessary.
(20 marks)

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