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Which risk did early vehicle networks not anticipate?

  • A.Deliberate attack through a connected interface
  • B.Electrical interference, which was addressed by the differential signalling used by the controller area network
  • C.None
  • D.Remote compromise through a telematics or entertainment connection reaching the safety critical control units

Answer: A

The protocols were designed for reliability rather than security and carry no authentication. The last option describes exactly the threat that emerged, which makes it a correct and more concrete statement. The shared behaviour explains why these belong together and the differences explain why both exist. The order in which the effects act is what decides the outcome, so it is worth establishing first. Checking the units of each quantity catches a wrong formula before the arithmetic begins.

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