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LGW支持的VOICE CODEC TYPE有哪几种？
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Which three statements are true about the data traffic characteristics of voice traffic？ （）A、latency must be kept below 150 msB、latency is not a concern as long as jitter is kept below 30 msC、voice packets do not require a specific type of queuingD、voice packets are rather smallE、voice packets require TCP for rapid retransmission of dropped packetsF、voice packets require a fairly constant bandwidth reserved for voice control traffic as well as forthe voice payload
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When analog signals are digitized using the G.711 codec， voice samples are encapsulated into protocol data units （PDUs） involving which three headers？ （）A、IPB、TCPC、RTPD、UDPE、H323F、CRTP
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When determining a customer’s technical requirements for a Cisco Unified Communications solution， which important tool can be used to determine the bandwidth used by different codecs with various protocols over different media？（）A、Network Codec Aggregator ToolB、Bandwidth Estimator ToolC、Unified Communication Bandwidth ToolD、Voice Bandwidth CalculatorE、Voice Codec Bandwidth Calculator
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Cisco AutoQoS takes the interface type and bandwidth into consideration when configuring which three QoS features？（）A、voice compression methodologyB、LLQC、CRTPD、routing protocolE、LFIF、trust boundary
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在AWS上配置Signaling VLAN时,service type选择（）。A、RB VLANB、L2 Terminated VLANC、Stacking VLAND、Voice VLAN
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在AWS上配置VOICE VLAN时,service type选择（）。A、RB VLANB、L2 Terminated VLANC、Stacking VLAND、Voice VLAN
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LGW对于用户有电无音的申告,可能的原因有以下哪几个( )A、软交换未正确发送要求LGW监控摘机事件的信令,导致LGW无法上报摘机事件B、LGW上的DSP或CODEC不正常C、LGW上该用户的端口状态是OPR的D、该用户在LGW上的实际状态是parking的
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Which statement is NOT a key QoS recommended requirement for voice bearer traffic?（）A、Voice traffic should be marked to DSCP EF per the QoS baseline and RFC3246.B、Voice traffic loss should be no more than 3%.C、One-way latency （mouth-to-ear） should be less than 150 msec.D、Average one way jitter should be targeted to less than 30 msec.E、21-320 Kbps of guaranteed priority bandwidth is required per call depending on sample rate，codec，and layer 2 overhead.
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多选题When analog signals are digitized using the G.711 codec， voice samples are encapsulated into protocol data units （PDUs） involving which three headers？ （）AIPBTCPCRTPDUDPEH323FCRTP
考题
多选题Which three statements are true about the data traffic characteristics of voice traffic？ （）Alatency must be kept below 150 msBlatency is not a concern as long as jitter is kept below 30 msCvoice packets do not require a specific type of queuingDvoice packets are rather smallEvoice packets require TCP for rapid retransmission of dropped packetsFvoice packets require a fairly constant bandwidth reserved for voice control traffic as well as forthe voice payload
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