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Which network suits simple low speed devices such as switches?

  • A.The controller area network, whose speed and robustness make it suitable for every device fitted to the vehicle
  • B.Ethernet
  • C.A single wire master and slave network, which is inexpensive and adequate for mirrors, seats and similar devices
  • D.The local interconnect network

Answer: D

A local interconnect network is a single wire master and slave bus running at up to twenty kilobits per second. The last option describes exactly that, which makes it a correct and more descriptive version of the same answer. Tracing the requirement back to the physical constraint that produces it makes the answer follow. Naming what changes and what stays the same is the reliable route through questions of this shape. Framing the question as which quantity the change acts upon makes the answer follow without calculation.

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