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Keep in mind that several intermediate network devices can be located on the data path between the source and the receiver, with having independent packets packet queues on each, i.e. an effective QoS policy implementation will require the configuration of all the network nodes.
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The main conclusions from the previous section, which will be used to define the quality metrics, are the following:
- The communication channel and throughput of the communication channel and of the network devices throughput is not endlesslimited.
- The data delivery time from source to destination is non-zero.
- A communication channel is a medium with a set of physical parameters that define determine the signal propagation effects.
- The software and hardware network device architecture can affect the data distribution.
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