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Which advantage does a fixed time schedule give?

  • A.A higher average throughput, which follows from the absence of the arbitration overhead of a priority based network
  • B.Lower cost
  • C.Complete predictability, since each node knows precisely when it may transmit and when each message will arrive
  • D.Every message has a guaranteed transmission slot

Answer: D

A static schedule removes any uncertainty about when a message will be sent. The last option explains exactly that property, which makes it a correct and more instructive version of the same answer. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision. 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.

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