单选题What ensures that voice packets are given priority throughout the network so that conversations arrive intact?（）ACentrexBPacket encryptionCIntelligent call routingDQoS
单选题
What ensures that voice packets are given priority throughout the network so that conversations arrive intact?（）
A
Centrex
B
Packet encryption
C
Intelligent call routing
D
QoS
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解析：
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相关考题：
What ensures that voice packets are given priority throughout the network so that conversations arrive intact?() A.CentrexB.Packet encryptionC.Intelligent call routingD.QoS
Choose the false statement concerning the use of CiscoWorks Internetwork Performance Monitor (IPM) in a Teleworker deployment.（）A、IPM should not be run on a production network. B、IPM helps verify if a Service Provider is meeting the Service Level Agreement. C、IPM contains a database that can store data on latency, jitter, and drops of voice packets over a period of weeks or months. D、The QoS service policy should contain an allocation of sufficient bandwidth in the priority queue (LLQ) for both the SAA probe simulating a voice call and the voice call. If not, voice quality will suffer.
What can be used to maintain the voice quality on a link by limiting the number of calls that can be active at any given time？（）A、 Call Management Link AgentB、 Traffic policingC、 Call Admission ControlD、 QoS Link Congestion ManagementE、 Oversubscription Link Detection
Why is QoS important in a converged network?（）A、Because voice data packets must follow a single dedicated path through the networkB、Because voice data packets should arrive quickly and sequentially, and with no lost dataC、Because lost voice-data packets must be retransmittedD、Because data does not need to arrive intact, so data transfer rates can be variable
Which two statements about the QoS policy generation phase of the Cisco SDM QoS wizard are true？ （）A、 The SDM QoS wizard will create two real-time traffic classes to handle VoIP and voice signaling packets.B、 The SDM QoS wizard will create three real-time traffic classes to handle VoIP， voice signaling， and video packets.C、 The SDM QoS wizard will create four real-time traffic classes to handle VoIP， voice signaling， video， and video streaming packets.D、 The SDM QoS wizard will create two business-critical traffic classes to handle transactional and network management packets.E、 The SDM QoS wizard will create three business-critical traffic classes to handle transactional， network management， and routing packets.F、 The SDM QoS wizard will create four business-critical traffic classes to handle transactional， network management， routing， and best-effort packets.
Refer to the exhibit. A router has a 256 kbps Frame Relay circuit connected to interface serial 0/0. As a large FTP packet is being placed into the hardware transmit queue of interface serial 0/0， a voice packet is placed into the priority queue of that interface. How， and in what order， wi the packets be transmitted？（）A、the voice packet will be transmitted first， followed by the FTP packet in its entiretyB、the voice packet will be transmitted first， followed by the fragmented FTP packetC、the FTP packet will be fragmented and the voice packet will be interleavedD、the FTP packet will be transmitted first in its entirety， follow by the voice packet
What ensures that voice packets are given priority throughout the network so that conversations arrive intact?（）A、CentrexB、Packet encryptionC、Intelligent call routingD、QoS
Which parameter， when enabled on a standalone access point， gives the highest priority to a voice packet even when qos is not enabled？（）A、igmp snoopingB、wmmC、qos element for wireless phonesD、avvid priority mapping
Which two statements are true about Voice over IP （VoIP） packet delivery in a digital infrastructure？ （）A、 Packets can arrive out of order.B、 Packets must take the same path to the destination.C、 Once packets are received at the destination router， the router performs sampling to ensure the quality of the voice traffic.D、 Packets can experience varying delays across the network.E、 Packets containing voice samples are sequentially numbered by default， allowing for reordering upon arrival at the terminal router along the path.
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.
What is the goal of QoS in a network？ （）A、prevent packets from being droppedB、increase available bandwidthC、reduce hardware errorsD、provide predictable network serviceE、eliminate propagation delayF、eliminate jitter and packet loss
Which statement best describes the application of link fragmentation and interleaving （LFI）？（）A、It compresses the Layer 2 payload and marks the packet as a high priority to be transmitted firstB、It fragments larger packets and allows VoIP packets to be transmitted in between them.C、It stops the transmission of large packets when priority packets arrive.D、It sends high priority packets in between normal traffic packets.
Which three practices are important to the implementation of a DiffServ QoS architecture？（）A、 Because services are allocated throughout the network before the transmission of data begins， traffic classes can be guaranteed QoS services.B、 Traffic classes are marked with Layer 2 markings to allow for more granularity in identifying traffic classes.C、 Traffic classes are marked with Layer 3 markings to allow them to traverse different network types without loss of QoS information.D、 Traffic classes allow networks to provide proper QoS treatment of packets without applications having to request services.E、 Based upon the network capabilities， QoS markings are placed on packets as needed throughout the network to allow for proper QoS treatment of packets.F、 QoS markings are placed on packets as close to the network edge as possible to allow distribution and core devices to determine QoS actions as quickly as possible.
Why is QoS important in a converged network?（）A、Because data does not need to arrive intact, so data transfer rates can be variableB、Because lost voice-data packets must be retransmittedC、Because voice data packets should arrive quickly and sequentially, and with no lost dataD、Because voice data packets must follow a single dedicated path through the network
What are two major sources of delay that can be managed by QoS in voice-enabled networks？（）A、propagation delayB、voice packet serialization delayC、congested egress queuesD、header overheadE、packets dropped because of CRC errors
Which two statements are true about network voice traffic？ （Choose two.）（）A、 Voice traffic is affected more by link speed than FTP traffic is.B、 Voice traffic is affected more by packet delays than FTP traffic is.C、 Voice streams involve larger packet sizes than most TCP network traffic involves.D、 Voice traffic is more sensitive to packet loss than TCP network traffic is.E、 Voice traffic requires QOS mechanisms only in heavily loaded network segments.
What ensures that voice packets are given priority throughout the network so that conversations arrive intact?（）A、QoSB、CentrexC、Packet encryptionD、Intelligent call routing
单选题Why is QoS important in a converged network?（）ABecause data does not need to arrive intact, so data transfer rates can be variableBBecause lost voice-data packets must be retransmittedCBecause voice data packets should arrive quickly and sequentially, and with no lost dataDBecause voice data packets must follow a single dedicated path through the network
单选题Which parameter， when enabled on a standalone access point， gives the highest priority to a voice packet even when qos is not enabled？（）Aigmp snoopingBwmmCqos element for wireless phonesDavvid priority mapping
多选题Which three practices are important to the implementation of a DiffServ QoS architecture？（）ABecause services are allocated throughout the network before the transmission of data begins， traffic classes can be guaranteed QoS services.BTraffic classes are marked with Layer 2 markings to allow for more granularity in identifying traffic classes.CTraffic classes are marked with Layer 3 markings to allow them to traverse different network types without loss of QoS information.DTraffic classes allow networks to provide proper QoS treatment of packets without applications having to request services.EBased upon the network capabilities， QoS markings are placed on packets as needed throughout the network to allow for proper QoS treatment of packets.FQoS markings are placed on packets as close to the network edge as possible to allow distribution and core devices to determine QoS actions as quickly as possible.
单选题Refer to the exhibit. A router has a 256 kbps Frame Relay circuit connected to interface serial 0/0. As a large FTP packet is being placed into the hardware transmit queue of interface serial 0/0， a voice packet is placed into the priority queue of that interface. How， and in what order， wi the packets be transmitted？（）Athe voice packet will be transmitted first， followed by the FTP packet in its entiretyBthe voice packet will be transmitted first， followed by the fragmented FTP packetCthe FTP packet will be fragmented and the voice packet will be interleavedDthe FTP packet will be transmitted first in its entirety， follow by the voice packet
单选题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.
单选题Why is QoS important in a converged network?（）ABecause voice data packets must follow a single dedicated path through the networkBBecause voice data packets should arrive quickly and sequentially, and with no lost dataCBecause lost voice-data packets must be retransmittedDBecause data does not need to arrive intact, so data transfer rates can be variable
单选题Choose the false statement concerning the use of CiscoWorks Internetwork Performance Monitor (IPM) in a Teleworker deployment.（）AIPM should not be run on a production network. BIPM helps verify if a Service Provider is meeting the Service Level Agreement. CIPM contains a database that can store data on latency, jitter, and drops of voice packets over a period of weeks or months. DThe QoS service policy should contain an allocation of sufficient bandwidth in the priority queue (LLQ) for both the SAA probe simulating a voice call and the voice call. If not, voice quality will suffer.
单选题Which statement best describes the application of link fragmentation and interleaving （LFI）？（）AIt compresses the Layer 2 payload and marks the packet as a high priority to be transmitted firstBIt fragments larger packets and allows VoIP packets to be transmitted in between them.CIt stops the transmission of large packets when priority packets arrive.DIt sends high priority packets in between normal traffic packets.
单选题What is the goal of QoS in a network？ （）Aprevent packets from being droppedBincrease available bandwidthCreduce hardware errorsDprovide predictable network serviceEeliminate propagation delayFeliminate jitter and packet loss
单选题What can be used to maintain the voice quality on a link by limiting the number of calls that can be active at any given time？（）A Call Management Link AgentB Traffic policingC Call Admission ControlD QoS Link Congestion ManagementE Oversubscription Link Detection
单选题What ensures that voice packets are given priority throughout the network so that conversations arrive intact?（）AQoSBCentrexCPacket encryptionDIntelligent call routing