多項選擇題

Which two statements about the best effort model for QoS are true？（）

A.delay sensitive packets are given preferential treatment
B.the default policy identifies a delay sensitive class and default class
C.the default policy identifies a delay sensitive class， best effort class， and default class
D.the model is highly scalable
E.the model is still predominant on the internet F the model provides guaranteed service

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多項選擇題

Which two statements are true about CAC？（）

A.CAC is implemented in the call setup phase to allocate bandwidth resources
B.CAC is implemented in the call maintenance phase to allocate bandwidth resources
C.CAC is utilized during the call teardown phase to ensure that all resources have been released
D.CAC uses the Cisco RSVP （Resource Reservation Protocol） Agent to integrate call-processing capabilities with the underlying network infrastructure
E.CAC is implemented in the call setup phase to determine the destination of the call

多項選擇題

For defining the QoS policies for each traffic class， which parameters should be identified？（）

A.minimum bandwidth guarantee
B.average bandwidth guarantee
C.optimum bandwidth guarantee
D.maximum bandwidth rate
E.IP precedence
F.priority

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Which two statements about the best effort model for QoS are true？（）

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Which two statements are true about CAC？（）

For defining the QoS policies for each traffic class， which parameters should be identified？（）

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Which two statements about the best effort model for QoS are true？（）

Which two statements are true about CAC？（）

For defining the QoS policies for each traffic class， which parameters should be identified？（）