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Pre-Queuing Operators

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Pre-Queuing Operators

Once packets have been classified, the next set of functions in the QoS behavior model, pre-queuing operations, are employed. Pre-queuing operations are employed before queue capacity in the network device is consumed. Pre-queuing operations ensure that queue capacity is used only by those application flows that are sanctioned on the network. Pre-queuing operations can also result in the marking, or coloring, of packets, which allows the network device itself, along with any upstream intermediary network device that uses the same coloring scheme, to correctly understand the relative priority and handling requirements of the packets being received. In addition to packet marking, pre-queuing operations include packet dropping and policing.

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