单选题Which QoS model manages the QoS requirements for the network on a per-hop behavior （PHB） basis？（）Abest-effort deliveryBingress committed rate （ICR）Cshaping and policingDegress committed rate （ECR）EIntegrated Services （IntServ）Fdifferentiated services （DiffServ）
单选题
Which QoS model manages the QoS requirements for the network on a per-hop behavior （PHB） basis？（）
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）
参考解析
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