多项选择题

Which two functions can be provided by an Integrated Services Router （ISR） in a VoIP network？（）

A. ISR can perform the functions of a multipoint control unit to facilitate voice conferencing.
B. ISR can perform the function of a call agent in the event of loss of communication with a CallManager.
C. ISR can provide XML applications to the phones.
D. ISR can provide all of the functionality of a CallManager in the event of loss ofcommunication to the CallManager.
E. ISR can act as a voice gateway to the PSTN.

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热门试题

多项选择题Whichtwostatementsarecorrectaboutthesignalingmethodsthatareutilizedfortransmittingvoice？（）

A. Channel-associated signaling transmits control signals in band and therefore reduces the bandwidth available for the voice data stream.
B. Channel-associated signaling utilizes a separate TDM channel for transmitting control signals.
C. Common channel signaling transmits control signals in band and therefore reduces the bandwidth available for the voice data stream.
D. Common channel signaling uses one of the TDM channels to transmit control information reducing the number of channels available for voice.
E. ISDN BRIs implement channel-associated signaling.

多项选择题WhichtwoVoIPcapabilitiesareutilizedwhentheCallManagerandthegatewayareconfiguredforSurvivableRemoteSiteTelephony？（）

A. Analog phones， connected to the PSTN， act as internal call agents if IP communication to the CallManager is lost.
B. An onsite gateway reroutes calls over the PSTN if IP communication to the CallManager is lost.
C. The IP phones can reroute calls over the PSTN if IP communication to the CallManager is lost.
D. Local voice gateways can assume the function of a call agent if IP communication to the CallManager is lost.
E. IP phones use an internal call agent if IP communication to the CallManager is lost.

单项选择题Whatcanbeusedtomaintainthevoicequalityonalinkbylimitingthenumberofcallsthatcanbeactiveatanygiventime？（）

A. Call Management Link Agent
B. Traffic policing
C. Call Admission Control
D. QoS Link Congestion Management
E. Oversubscription Link Detection

单项选择题WhichstatementistrueabouttheCallAdmissionControl（CAC）featureinVoIPnetworks？（）

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.

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.