单项选择题
Which statement is true about the Call Admission Control （CAC） feature in VoIP networks？（）
A. CAC is used to allocate enough bandwidth for the number of calls that are allowed on the VoIP network.
B. CAC is used to protect the quality of the voice calls by preventing call establishment if enough resources are not available on the network.
C. CAC provides queuing mechanisms for voice calls if the packets exceed the configured or budgeted rate.
D. In a VoIP network the CAC can be replaced with the LLQ QoS mechanism if it has been properly implemented.
相关考题
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多项选择题
WhenCiscoSDMisusedtogenerateQoSpolicy，variousQoSclasseswillbecreatedandassignedapercentageoftheinterfacebandwidth.WhichthreestatementsindicatethedefaultbandwidthvaluesthatareassignedbySDMforoutgoingtrafficonaWANinterface？（）
A. Voice traffic will be assigned 47% of the interface bandwidth.
B. Voice call signaling will be assigned 33% of the interface bandwidth.
C. Telnet， SSH， and other traffic that is generated to manage the router is assigned 5% of the interface bandwidth.
D. Best-effort traffic will be assigned 38% of the interface bandwidth.
E. Routing protocol traffic will be assigned 5% of the interface bandwidth.
F. Transactional traffic will be assigned 5% of the interface bandwidth. -
多项选择题
TheCiscoSDMwillcreateaQoSpolicythatprovidesservicestotwotypesoftraffic.WhichtwostatementsindicatethedefaultQoSparametersthatarecreatedbySDM？（）
A. Business-critical traffic will be sorted into two QoS classes.
B. Real-time traffic will be sorted into one QoS class.
C. Voice traffic will be considered real-time traffic while call signaling will be considered business-critical.
D. All traffic except real-time will be considered best-effort.
E. Routing， management， and transactional traffic will be considered business-critical.
F. Voice and call signaling traffic will be considered real-time. -
单项选择题
End-to-endQoSismaintainedintheCiscoWLANdeploymentmodelbyutilizingwhatparameterinlieuof802.1p？（）
A. IP precedence
B. type of service （ToS）
C. class of service （CoS）
D. differentiated services code point （DSCP）
