Refer to the wxhibit . what QOS model should be used to reserve the requested bandwidth and delay needed for each allowed VOIP call regardless of changing networkconditions？（） A.best-effort deliveryB.ingress committed rate （ICR）C.shaping and policingD.egress committed rate （ECR）E.integrated Services （IntServ）F.differentiated services （DiffServ）

单项选择题

Refer to the wxhibit . what QOS model should be used to reserve the requested bandwidth and delay needed for each allowed VOIP call regardless of changing networkconditions？（）

A.best-effort delivery
B.ingress committed rate （ICR）
C.shaping and policing
D.egress committed rate （ECR）
E.integrated Services （IntServ）
F.differentiated services （DiffServ）

CCNP(642-845)