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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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更多 “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.” 相关考题
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 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
What does the interface subcommand switchport voice vlan 222 indicate？（）A、The port is configured for both data and voice traffic.B、The port is fully dedicated to forwarding voice traffic.C、The port will operate as an FXS telephony port.D、Voice traffic will be redirected to VLAN 222.
考题
Which two statements are true about voice VLANs？（）A、Voice VLANs are only used when connecting an IP phone and a host to distinct switch portsB、Access ports that are configured with voice VLANs will always trust the CoS that is received from IP phonesC、Access ports that are configured with voice VLANs may or may not override the CoS value that is received from an IP phoneD、Voice VLANs are configured using the switchport voice vlan vlan-ID interface configuration commandE、Voice VLANs provide a trunking interface between an IP phone and an access port on a switch to allow traffic from multiple devices that are connected to the portF、Enabling Voice VLAN on a switch port will automatically configure the port to trust the incoming CoS markings
考题
You need to configure a new Company Catalyst 3560 switch for a VOIP-enabled office. Which three statements are true about the voice VLAN feature on this switch？（）A、The default CoS value for incoming traffic is set up to 0.B、The CoS value is trusted for 802.1p or 802.1q tagged traffic.C、PortFast is automatically disabled when a voice VLAN is configured.D、The voice VLAN feature is disabled by default.E、The IP phone accepts the priority of all tagged and untagged traffic and sets the CoS value to 4.F、When the voice VLAN feature is enabled， all untagged traffic is sent according to the default CoS priority of the port
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
Which two statements are true about the application of QoS in a converged network？（）A、end-to-end network delay times that exceed 50 ms for real-time traffic are considered unacceptableB、end-to-end network delay times that exceed 250 ms for real-time traffic are considered unacceptableC、end-to-end network delay is not a factor as long as the delay is consistentD、some packet loss can be corrected by codec algorithmsE、RSVP handles voice packet retransmissionF、fragmentation is a result of packet loss
考题
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 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
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
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.
考题
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.
考题
Which three characteristics are true about voice traffic in the campus network？ （）A、TCP retransmitsB、benignC、greedyD、drop sensitiveE、smoothF、delay insensitive
考题
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 traffic.C、UDP is used to ensure a reliable transmission from sender to receiver.D、RTP is used to provide resource reservation for the voice stream.E、UDP provides multiplexing of multiple phone conversations.
考题
多选题Refer to the exhibit. What are three of the basic components of a VoIP network？（）Asoftware voice applicationsBmultipoint control unit （MCU）CgatekeeperDcall agentEinteractive voice response （IVR） systemsFsoftphones
考题
多选题Which two statements are true about the application of QoS in a converged network？（）Aend-to-end network delay times that exceed 50 ms for real-time traffic are considered unacceptableBend-to-end network delay times that exceed 250 ms for real-time traffic are considered unacceptableCend-to-end network delay is not a factor as long as the delay is consistentDsome packet loss can be corrected by codec algorithmsERSVP handles voice packet retransmissionFfragmentation is a result of packet loss
考题
单选题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
多选题Which two statements are true about network voice traffic？ （Choose two.）（）AVoice traffic is affected more by link speed than FTP traffic is.BVoice traffic is affected more by packet delays than FTP traffic is.CVoice streams involve larger packet sizes than most TCP network traffic involves.DVoice traffic is more sensitive to packet loss than TCP network traffic is.EVoice traffic requires QOS mechanisms only in heavily loaded network segments.
考题
单选题What does the interface subcommand switchport voice vlan 222 indicate？（）A
The port is configured for both data and voice traffic.B
The port is fully dedicated to forwarding voice traffic.C
The port will operate as an FXS telephony port.D
Voice traffic will be redirected to VLAN 222.
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.
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
多选题Which three characteristics are true about voice traffic in the campus network？ （）ATCP retransmitsBbenignCgreedyDdrop sensitiveEsmoothFdelay insensitive
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
考题
单选题If voice and data traffic will be sent and received via a WAN links， what must be configured to provide a certain amount of dedicated bandwidth and to prioritize the voice traffic over other types of network traffic？（）A
IPSec VPNB
QoS mechanismC
FirewallD
NATE
EIGRP routing protocolF
Static routing
考题
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
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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