Which two QoS models should be part of a network redesign to ensure that IP QoS is deployed to support data, voice and videos application? (Choose two)

Which two QoS models should be part of a network redesign to ensure that IP QoS is deployed to support data, voice and videos application? (Choose two)
A . Integrated Services by reserving network resources end-to-end before sending data
B . Differentiated Services by managing network resources to provide QoS to specific user
packet flows
C . Differentiated Services by categorizing application traffic into multiple classes marked directly in the packets
D . Differentiated Sen/ices by reserving network resources end-to-end before sending data
E . Integrated Services by categorizing application traffic into multiple classes marked directly in the packets

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Answer: A,C