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Which measure improves the security of modern vehicle networks?

  • A.Authenticated messages together with a firewall at the gateway and secure boot within the individual control units
  • B.Message authentication and gateway filtering
  • C.A password on the diagnostic socket, which prevents any unauthorised access to the networks within the vehicle
  • D.Nothing

Answer: B

Authentication codes on critical messages, gateway filtering and secure boot together raise the barrier considerably. The last option lists those measures, which makes it a correct and fuller version of the same answer. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision. Checking which component actually carries the load settles most questions of this kind at once. Reading the definition literally, rather than recalling a summary, avoids the usual confusion.

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