Alternatively, QoS service responses may be distinguished by providing a consistent, and therefore
predictable, service response that is unaffected by network congestion levels. These are quantitative
service responses, where the characteristics of the service can be measured against a constant outcome.
A quantitative service many be one that constrains jitter to a maximum level, or one that makes a
certain bandwidth available, within parameters of bounded jitter. Such constant-rate services may be
better than best-effort services when the network is under load, but they may also be worse than best
effort when the network is unloaded.
Alternatively, QoS service responses may be distinguished by providing a consistent, and thereforepredictable, service response that is unaffected by network congestion levels. These are quantitativeservice responses, where the characteristics of the service can be measured against a constant outcome.A quantitative service many be one that constrains jitter to a maximum level, or one that makes acertain bandwidth available, within parameters of bounded jitter. Such constant-rate services may bebetter than best-effort services when the network is under load, but they may also be worse than besteffort when the network is unloaded.
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