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
Why is QoS important in a converged network?（）
A
Because voice data packets must follow a single dedicated path through the network
B
Because voice data packets should arrive quickly and sequentially, and with no lost data
C
Because lost voice-data packets must be retransmitted
D
Because data does not need to arrive intact, so data transfer rates can be variable
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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？（）Aend-to-end delayBinterference from bulk data trafficCprocessing delaysDserialization delaysEjitter
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
多选题Which two statements are true about Voice over IP （VoIP） packet delivery in a digital infrastructure？ （）APackets can arrive out of order.BPackets must take the same path to the destination.COnce packets are received at the destination router， the router performs sampling to ensure the quality of the voice traffic.DPackets can experience varying delays across the network.EPackets containing voice samples are sequentially numbered by default， allowing for reordering upon arrival at the terminal router along the path.
单选题When troubleshooting a network， the output of the command show interfaces indicates a large number of runts. What is a runt？（）Athe number of packets that are discarded because they exceed the maximum packet size of the mediumBerrors created when the CRC generated by the originating LAN station or far-end device does not match the checksum calculated from the data received.Cthe number of packets that are discarded because they are smaller than the minimum packet size of the mediumDthe number of received packets that were ignored by the interface because the interface hardware ran low on internal buffersEthe number of times that the interface requested another interface within the router to slow down
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
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
多选题VOIP has been implemented at the main office of the Company network. Which two statements are true about voice packets in a LAN？（）AVoice carrier stream utilizes Real-Time Transport Protocol (RTP) to carry the audio/media portion of the VoIP communication.BVoice traffic data flow involves large volumes of large packets.CBecause a packet loss involves a small amount of data, voice traffic is less affected by packet losses than traditional data traffic is.DVoice packets are encapsulated in TCP segments to allow for proper sequencing during delivery.EVoice packets are very sensitive to delay and jitter.
单选题In your production database, users report that they are unable to generate reports on an important table because it does not contain any data. While investigating the reason, you realize that another user executed the TRUNCATE TABLE command, which accidentally caused the data to be lost. Now you want to recover the lost data of the table without affecting objects in other schemas. Which method must you use to recover the lost data?（）AComplete Recovery with online redo logBComplete Recovery with archived redo logCTablespace Point-in-Time Recovery (TSPITR)DIncomplete Recovery with system change number (SCN)
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.
单选题Refer to the exhibit. Which statement is true about a voice VLAN？（）A Physically the voice network and the data network are separateB The voice traffic will normally be on a different IP subnet than will the data trafficC End user intervention is necessary to place the phone into the proper VLAND The same security policy should be implemented for both voice and data trafficE The data VLAN must be configured as the native VLAN
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