Sequence of Queues

• The simplest model of a network is a sequence of queues, corresponding to the different packet transmission stages.

• If we vary the packet size

  • The steps are serialised, so end to end delay is the sum of time in all the queues
  • The gradient of the time against length plot is the sum of the extra costs

• If we consider inter-arrival times, the result is the time for the slowest server, not the sum.

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