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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
参考答案
更多 “What ensures that voice packets are given priority throughout the network so that conversations arrive intact?（）A、CentrexB、Packet encryptionC、Intelligent call routingD、QoS” 相关考题
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
考题
To ensure voice packets are kept within the Committed Information Rate (CIR) of a Frame Relay link, what should be used in the CPE?()
A. prioritizationB. classificationC. fragmentationD. traffic shaping
考题
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
考题
Which two statements are true about voice packets in a LAN？ （Choose two.） （）A、 Voice traffic data flow involves large volumes of large packets.B、 Because a packet loss involves a small amount of data， voice traffic is less affected by packet losses than traditional data traffic is.C、 Voice carrier stream utilizes Real-Time Transport Protocol （RTP） to carry the audio/media portion of VoIP communication.D、 Voice packets are very sensitive to delay and jitter.E、 Voice packets are encapsulated in TCP segments to allow for proper sequencing during delivery.
考题
Which two statements are true about MLP interleaving？ （）A、 It fragments and encapsulates all packets in a fragmentation header.B、 Packets smaller than the fragmentation size are interleaved between the fragments of thelarger packets.C、 Packets larger than the fragmentation size are always fragmented， and cannot be interleaved，even if the traffic is voice traffic.D、 It fragments and encapsulates packets that are longer than a configured size， but does not encapsulate smaller packets inside a fragmentation header.
考题
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？（）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
考题
To ensure voice packets are kept within the Committed Information Rate （CIR） of a Frame Relaylink， what should be used in the CPE？（）A、 prioritizationB、 classificationC、 fragmentationD、 traffic shaping
考题
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.
考题
VOIP has been implemented at the main office of the Company network. Which two statements are true about voice packets in a LAN？（）A、 Voice carrier stream utilizes Real-Time Transport Protocol (RTP) to carry the audio/media portion of the VoIP communication. B、 Voice traffic data flow involves large volumes of large packets. C、 Because a packet loss involves a small amount of data, voice traffic is less affected by packet losses than traditional data traffic is. D、 Voice packets are encapsulated in TCP segments to allow for proper sequencing during delivery. E、 Voice packets are very sensitive to delay and jitter.
考题
SDM creates a low latency queuing （LLQ） service policy with its associated classes. What are the two types of low latency queuing available using the SDM QoS wizard？（）A、 FIFO queuing， which provides a means to hold packets while they are waiting to exit an interfaceB、 Priority queuing， which ensures a fixed amount of bandwidthC、 Custom queuing （CQ）， which provides a queuing tool that services all queues， even during times of congestionD、 Bandwidth queuing， which ensures a minimum amount of bandwidthE、 Weighted fair queuing （WFQ）， which classifies packets based on flows
考题
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
考题
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
考题
Interface congestion is causing drops in voice packets and TCP packets. The drops result in jerky speech quality and slower FTP traffic flows. Which two technologies would proactively address the TCP transfer rate and the voice problems？（）A、CBWFQB、LLQC、traffic shapingD、WRED
考题
What ensures that voice packets are given priority throughout the network so that conversations arrive intact?（）A、QoSB、CentrexC、Packet encryptionD、Intelligent call routing
考题
Authentication for user data traffic is important, but so is authentication for IP voice traffic. The Cisco 830 802.1 feature provides an easier method for allowing IP voice traffic through the VPN, because it（）.A、requires access lists to identify the voice traffic B、can allow traffic from a device without 802.1X authentication, by MAC addressC、can allow traffic from Cisco IP phones by listening to their CDP advertisementsD、allows all packets marked with a ToS of 5 to bypass authenticationE、allows all IP voice packets to bypass authentication via stateful inspection
考题
What is one of the reasons that custom QoS ACLs are recommended over automatic QoS when configuring ports on a Catalyst 6500 for use with IP phones？（）A、 79xx IP phones do not automatically mark voice packets with non-zero DSCP values.B、 79xx IP phones do not mark protocol packets such as DHCP， DNS， or TFTP with non-zero DSCP values.C、 79xx IP phones do not mark voice packets with optimal DSCP values.D、 79xx IP phones use a custom protocol to communicate CDP information to the switch.
考题
A stream of voice packets transmitted over a WAN network encounters differing queuing delays. One router in the path used by the voice packets delays some of the packets for 4 ms while transmitting a large video file， but delays other packets only 2 ms. Another router delays some packets 5 ms， but transmits others in 2 ms. How would you best describe this type of problem？（）A、end-to-end delayB、interference from bulk data trafficC、processing delaysD、serialization delaysE、jitter
考题
单选题A stream of voice packets transmitted over a WAN network encounters differing queuing delays. One router in the path used by the voice packets delays some of the packets for 4 ms while transmitting a large video file， but delays other packets only 2 ms. Another router delays some packets 5 ms， but transmits others in 2 ms. How would you best describe this type of problem？（）A
end-to-end delayB
interference from bulk data trafficC
processing delaysD
serialization delaysE
jitter
考题
单选题Refer to the exhibit. With an IPSec tunnel established between remote Router A and head-end router B, with Compressed Real-Time Protocol (cRTP) configured on the serial interface of Router A, what impact will the cRTP configuration have on the Voice over IP packets flowing through the IPSec tunnel from a Cisco 7960 IP phone?（）A
Twenty bytes of header will be replaced with five bytes. B
If the IPSec transform set includes Authentication Header, the receiving IPSec peer will discard the packets. C
The IPSec packets will be dropped by Router A's compression logic.D
The voice packets will not be compressed.
考题
单选题What is one of the reasons that custom QoS ACLs are recommended over automatic QoS when configuring ports on a Catalyst 6500 for use with IP phones？（）A
79xx IP phones do not automatically mark voice packets with non-zero DSCP values.B
79xx IP phones do not mark protocol packets such as DHCP， DNS， or TFTP with non-zero DSCP values.C
79xx IP phones do not mark voice packets with optimal DSCP values.D
79xx IP phones use a custom protocol to communicate CDP information to the switch.
考题
单选题To ensure voice packets are kept within the Committed Information Rate （CIR） of a Frame Relaylink， what should be used in the CPE？（）A
prioritizationB
classificationC
fragmentationD
traffic shaping
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
考题
多选题Which two statements about the QoS policy generation phase of the Cisco SDM QoS wizard are true？ （）AThe SDM QoS wizard will create two real-time traffic classes to handle VoIP and voice signaling packets.BThe SDM QoS wizard will create three real-time traffic classes to handle VoIP， voice signaling， and video packets.CThe SDM QoS wizard will create four real-time traffic classes to handle VoIP， voice signaling， video， and video streaming packets.DThe SDM QoS wizard will create two business-critical traffic classes to handle transactional and network management packets.EThe SDM QoS wizard will create three business-critical traffic classes to handle transactional， network management， and routing packets.FThe SDM QoS wizard will create four business-critical traffic classes to handle transactional， network management， routing， and best-effort packets.
考题
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？（）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
考题
单选题What is required to enable fragmentation of large FTP packets when voice quality on the network is affected by FTP transfers?（）A
Configure TCP header compression on interfaceB
Configure MPL on the Frame Relay interfacesC
Configure FRF 12 fragmentation on the Frame Relay interfacesD
Fragmentation is not supported with service internetworking
考题
多选题Which two statements are true about voice packets in a LAN？ （Choose two.） （）AVoice traffic data flow involves large volumes of large packets.BBecause a packet loss involves a small amount of data， voice traffic is less affected by packet losses than traditional data traffic is.CVoice carrier stream utilizes Real-Time Transport Protocol （RTP） to carry the audio/media portion of VoIP communication.DVoice packets are very sensitive to delay and jitter.EVoice packets are encapsulated in TCP segments to allow for proper sequencing during delivery.
考题
单选题To ensure voice packets are kept within the Committed Information Rate (CIR) of a Frame Relay link, what should be used in the CPE?（）A
prioritizationB
classificationC
fragmentationD
traffic shaping
考题
多选题Authentication for user data traffic is important, but so is authentication for IP voice traffic. The Cisco 830 802.1 feature provides an easier method for allowing IP voice traffic through the VPN, because it（）.Arequires access lists to identify the voice trafficBcan allow traffic from a device without 802.1X authentication, by MAC addressCcan allow traffic from Cisco IP phones by listening to their CDP advertisementsDallows all packets marked with a ToS of 5 to bypass authenticationEallows all IP voice packets to bypass authentication via stateful inspection
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