□
□ 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).
Ø
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).
Ø
ØGuaranteed service also known as
“quantitative QoS” or “hard QoS” (absolute reservation of network resources and
cannot tolerate any violation of QoS guarantees).
Ø