QoS Service Levels
□
A
network’s capability to deliver the service requested by a client can be characterised
according to the end-to-end QoS strictness as:
□
ØBest-effort service or “lack of QoS”
(basic connectivity with no guarantees).
ØDifferentiated service or “qualitative QoS” or
“soft QoS” (some traffic is treated better than the rest, and service is
provided by distinguishing different classes of traffic).
ØGuaranteed service also known as
“quantitative QoS” or “hard QoS” (absolute reservation of network resources and
cannot tolerate any violation of QoS guarantees).
