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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
prioritization
B
classification
C
fragmentation
D
traffic shaping
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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
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单选题Which color does the router assign to packets received at a datarate that is above the committed rate but is below the peak rate?（）A
redB
whiteC
greenD
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单选题Which of the following is the BEST reason to label servers within the server room？（）A
To ensure server documentation is kept up to dateB
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To ensure server power requirements are metD
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Undo data is retained until the next full database backup.B
No committed undo data will be overwritten for 10 minutes.C
Committed undo data will be kept forever if not overwritten within 600 seconds.D
Guarantees that requested undo information are available until the instance is shut down.
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单选题Scientists should be kept _____ of the latest developments in their research areas.A
informB
informingC
informedD
to inform
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
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
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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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单选题An Enterprise decides to implement Authentication Proxy for per-user authentication for home offices. Each home office also supports an IP Phone. What should you do?（）A
Configure Access Control Lists to ensure Voice over IP traffic is checked by Auth Proxy.B
Configure pNAT to ensure Voice over IP packets are properly translated.C
Configure IOS firewall to permit RTP port numbers through the firewall via VPN. D
Configure Access Control Lists to allow Voice over IP traffic to bypass Auth Proxy checking.
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单选题The responsibilities of the engineer officer in charge of the watch do not include （）A
to ensure the main propulsion plant are kept under constant surveillanceB
to ensure the auxiliary systems are kept under constant surveillanceC
to inspect the steering gear spaces at suitable intervalsD
to inspect and overhaul the equipments in his charge
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