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多选题
Which statement is true about the comparison of voice traffic with video traffic？（）
A
video conferencing traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flows
B
latency requirements are less stringent for video traffic than for voice traffic
C
video traffic is less sensitive to dropped packets than for voice traffic
D
video traffic requires the retransmission capabilities of TCP whereas voice uses UDP
E
video traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flows
F
voice traffic requires the retransmission capabilities of TCP whereas video uses UDP
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更多 “多选题Which statement is true about the comparison of voice traffic with video traffic？（）Avideo conferencing traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flowsBlatency requirements are less stringent for video traffic than for voice trafficCvideo traffic is less sensitive to dropped packets than for voice trafficDvideo traffic requires the retransmission capabilities of TCP whereas voice uses UDPEvideo traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flowsFvoice traffic requires the retransmission capabilities of TCP whereas video uses UDP” 相关考题
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Which statement is true about IBGP routers? ()
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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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Which two statements are true about the protocols that are used for transmitting voice traffic？（）A、RTP multiplexing is used to keep multiple phone conversations separateB、RTP provides end-to-end delivery services for voice trafficC、UDP is used to ensure a reliable transmission from sender to receiverD、RTP is used to provide resource reservation for the voice streamE、UDP provides multiplexing
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Which statement is true about the capabilities of a voice gateway router？（）A、voice gateways with analog interfaces need a gatekeeper to convert analog signals into digital format before voice is encapsulated into IP packetsB、voice gateways need a gatekeeper to interconnect the VoIP networks the PSTN networkC、voice gateways with Cisco Unified CallManager Express （CME） can permanently act as a call agent for IP phonesD、voice gateways equipped with a DSP module can take the role of the call agent during WAN failure.
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Which statement is true about the comparison of voice traffic with video traffic？（）A、 Video conferencing traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flows.B、 Latency requirements are less stringent for video traffic than for voice traffic.C、 Video traffic is less sensitive to dropped packets than for voice traffic.D、 Video traffic requires the retransmission capabilities of TCP whereas voice uses UDP.E、 Voice traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flows.F、 Voice traffic requires the retransmission capabilities of TCP whereas video uses UDP.
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Which statement is true about the comparison of voice traffic with video traffic？（）A、video conferencing traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flowsB、latency requirements are less stringent for video traffic than for voice trafficC、video traffic is less sensitive to dropped packets than for voice trafficD、video traffic requires the retransmission capabilities of TCP whereas voice uses UDPE、video traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flowsF、voice traffic requires the retransmission capabilities of TCP whereas video uses UDP
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Which statement is true about voice VLANs？ （）A、When the voice VLAN feature is enabled， all untagged voice and data traffic is sent through the voice VLAN.B、The voice VLAN feature is enabled by default.C、The IP phone overrides the priority of all incoming data traffic （tagged and untagged） and sets the CoS value to 0.D、The default CoS value is 1 for incoming voice and data traffic.
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Which three characteristics are true about voice traffic in the campus network？ （）A、TCP retransmitsB、benignC、greedyD、drop sensitiveE、smoothF、delay insensitive
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多选题Which statement is true about the comparison of voice traffic with video traffic？（）Avideo conferencing traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flowsBlatency requirements are less stringent for video traffic than for voice trafficCvideo traffic is less sensitive to dropped packets than for voice trafficDvideo traffic requires the retransmission capabilities of TCP whereas voice uses UDPEvideo traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flowsFvoice traffic requires the retransmission capabilities of TCP whereas video uses UDP
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单选题Which statement is true about the capabilities of a voice gateway router？（）A
voice gateways with analog interfaces need a gatekeeper to convert analog signals into digital format before voice is encapsulated into IP packetsB
voice gateways need a gatekeeper to interconnect the VoIP networks the PSTN networkC
voice gateways with Cisco Unified CallManager Express （CME） can permanently act as a call agent for IP phonesD
voice gateways equipped with a DSP module can take the role of the call agent during WAN failure.
考题
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 separate.B
The voice traffic will normally be on a different IP subnet than will the data traffic.C
End user intervention is necessary to place the phone into the proper VLAN.D
The same security policy should be implemented for both voice and data traffic.E
The data VLAN must be configured as the native VLAN.
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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.
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多选题Which three characteristics are true about voice traffic in the campus network？ （）ATCP retransmitsBbenignCgreedyDdrop sensitiveEsmoothFdelay insensitive
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单选题Which statement is TRUE about the CacheFactory class ？（）A
it is a topology agnostic way to access NamedCachesB
it provides mechanisms to manage underlying remote data sourcesC
both A and B are TRUED
Neither A nor B are TRUE
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单选题Which statement is true about the distributed call control in a VoIP network？（）A
the VoIP endpoints have the intelligence to set up and control callsB
Call setup and control functionality is centralized in one call agent or clusterC
Call setup and control resides in call agents that are distributed throughout the networkD
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考题
多选题Which two statements are true about terms in a routing policy?（）AA then statement is mandatory in a termBIf a term does not contain a from statement, all routers matchCIf a term does not contain a from statement, the Junos OS will not commitDA then statement is not mandatory in a term
考题
单选题Which statement is true about IBGP routers? （）A
They must be fully meshedB
They can be in a different ASC
They must be directly connected
考题
单选题Which statement is true about the comparison of voice traffic with video traffic？（）A
Video conferencing traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flows.B
Latency requirements are less stringent for video traffic than for voice traffic.C
Video traffic is less sensitive to dropped packets than for voice traffic.D
Video traffic requires the retransmission capabilities of TCP whereas voice uses UDP.E
Voice traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flows.F
Voice traffic requires the retransmission capabilities of TCP whereas video uses UDP.
考题
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
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单选题Which statement is true about IP telephony calls？（）A
A Voice over IP （VoIP） packet consists of the voice payload， IP header， TCP header， RTP header， and Layer 2 link header.B
The voice carrier stream uses H323 to set up， maintain， and tear down call endpoints.C
Call control signaling uses Real-Time Transport Protocol （RTP） packets that contain actual voice samples.D
The sum of bandwidth necessary for each major application， including voice， video， and data， should not exceed 75 percent of the total available bandwidth for each link.
考题
单选题Which statement is true about voice VLANs？ （）A
When the voice VLAN feature is enabled， all untagged voice and data traffic is sent through the voice VLAN.B
The voice VLAN feature is enabled by default.C
The IP phone overrides the priority of all incoming data traffic （tagged and untagged） and sets the CoS value to 0.D
The default CoS value is 1 for incoming voice and data traffic.
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