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Why does a distributed coordination protocol avoid a central planner?

  • A.A central planner is a bottleneck and a single point of failure
  • B.Central planners cannot compute optimal allocations at all
  • C.Distributed protocols always produce better allocations
  • D.Regulations forbid central control of autonomous systems

Answer: A

Routing every decision through one component limits throughput, fails completely if that component fails, and requires global information that may not be available. Distributed protocols trade some optimality for robustness and scale. A central planner can compute optimal allocations given the information, which is precisely its advantage, and regulation is not the issue. Trading a guaranteed optimum for resilience and scale is a decision that depends on how likely failure is and how much optimality is worth.

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