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Refertothewxhibit.whatQOSmodelshouldbeusedtoreservetherequestedbandwidthanddelayneededforeachallowedVOIPcallregardlessofchangingnetworkconditions?()
A.best-effortdelivery
B.ingresscommittedrate(ICR)
C.shapingandpolicing
D.egresscommittedrate(ECR)
E.integratedServices(IntServ)
F.differentiatedservices(DiffServ)
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