During voice implementation， which two required items are configured at an access layer switch connected to an IP phone to provide VoIP communication？（）A、allowed codecsB、native VLANC、auxiliary VLAND、Cisco Unified Communications Manager IP addressE、RSTP
During voice implementation， which two required items are configured at an access layer switch connected to an IP phone to provide VoIP communication？（）
- A、allowed codecs
- B、native VLAN
- C、auxiliary VLAN
- D、Cisco Unified Communications Manager IP address
- E、RSTP
相关考题：
Refertotheexhibit.TheLCFSoftballLeagueisestablishingvoice-mailgroupstomoreefficientlysendmessagesforraindelaysandotherimportantmatters.IftheorganizationcheckstheIntegratedMessagingbox,membersofthisgroupwillbeallowedwhatIMAP-enabledprivilege?（）A.e-mailandvoice-mailmessageintegrationB.voice-mailandinstantmessageintegrationC.email，voice-mailandinstantmessageintegrationD.voice-mailmessagesmaybesentbyemailE.voice-mailmessagesmaybereceivedbyemail
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
Which two statements about voice VLANs are correct？（）A、Voice VLANs eliminate the need for QoS configurationB、Voice VLANs are used on trunk links to eliminate the need for QoS CoS markingsC、Voice VLANs are mainly used to reduce the number of access switch ports that are used in the networkD、Voice VLANs can be configured to forward existing CoS priorities or override themE、Voice VLANs are mainly used between access layer switches and distribution layer switchesF、Voice VLANs can be configured on Layer 2 ports only
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.
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.
You have configured voice VLANs on Catalyst switch R1. Which two statements are true about the operation of voice VLANs on this device？ （）A、 When the voice VLAN feature is enabled， all untagged traffic is sent according to the default CoS priority of the port.B、 Enabling voice VLANs enables the switch to create multiple queues for traffic that is entering a port.C、 When voice VLANs are configured on a trunk link， UplinkFast must also be enabled.D、 Voice VLANs are configured to enable the switch to forward frames marked with the proper CoS values over separate physical links.E、 Enabling voice VLANs enables the switch to forward frames with a specific 802.1P marking.
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
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.
Which two statements are true about the configuration of voice VLANs？（）A、Static secure MAC addresses can be configured in conjunction with voice VLANs.B、PortFast is automatically enabled when voice VLANs are configured.C、PortFast must be manually configured when voice VLANs are configured.D、Voice VLANs are typically configured on uplink ports.E、Voice VLANs are typically configured on access ports.
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.
Two sites are using a multisite centralized call processing model. The voice gateway on the remote branch has lost IP connectivity to its Cisco CallManager server. Which feature enables the remote gateway to take the role of the call agent during the WAN failure？ （）A、automated alternate routing （AAR）B、Cisco CallManager Attendant ConsoleC、real-time protocol （RTP）D、Survivable Remote Site Telephony （SRST）
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.
When QoS levels in the Cisco Wireless Control System （WCS） are entered， which profile names are used to identify the access categories？（）A、 platinum， gold， silver， and bronzeB、 voice， gold， silver， and bronzeC、 low delay， network critical， business， best effortD、 voice， video， background gold， background silver， and best effortE、 voice， video， best effort， and backgroundF、 voice， video， best effort， background， and scavenger
Which two statements correctly identify factors to consider when Configuring WAN QoS？（）A、Voice Traffic uses Assured ForwardingB、Voice Signaling traffic uses Assured ForwardingC、Voice Signaling traffic uses priority queuingD、Voice Traffic uses priority queuingE、Voice signaling traffic should use priority queuing with Assured Forwarding
Voice quality is bad due to high delay and jitter on a link. Which two actions will improve the quality of voice calls？（）A、Increase the queue size of the voice class.B、Guarantee bandwidth during congestion to the voice class with a bandwidth command.C、Increase the tx-ring of the egress interface.D、Implement LLQ for the voice class.E、Decrease the rx-ring of the egress interface.F、Decrease the queue size of the voice class.
单选题Which statement is true about the capabilities of a voice gateway router？（）Avoice gateways with analog interfaces need a gatekeeper to convert analog signals into digital format before voice is encapsulated into IP packetsBvoice gateways need a gatekeeper to interconnect the VoIP networks the PSTN networkCvoice gateways with Cisco Unified CallManager Express （CME） can permanently act as a call agent for IP phonesDvoice gateways equipped with a DSP module can take the role of the call agent during WAN failure.
多选题Voice quality is bad due to high delay and jitter on a link. Which two actions will improve the quality of voice calls？（）AIncrease the queue size of the voice class.BGuarantee bandwidth during congestion to the voice class with a bandwidth command.CIncrease the tx-ring of the egress interface.DImplement LLQ for the voice class.EDecrease the rx-ring of the egress interface.FDecrease the queue size of the voice class.
多选题During voice implementation， which two required items are configured at an access layer switch connected to an IP phone to provide VoIP communication？（）Aallowed codecsBnative VLANCauxiliary VLANDCisco Unified Communications Manager IP addressERSTP
单选题As an experienced network administrator, you are asked to troubleshoot a QoS problem. In which way might the Cisco NetFlow be helpful during the troubleshooting process?（）ANetFlow can discover the protocols in use and automatically adjust QoS traffic classes to meet policy-map requirements.BNetFlow records can be used to understand traffic profiles per class of service for data, voice, and video traffic.CNetFlow can be configured to identify voice and video traffic flows and place them into a low-latency queue for expedited processing.DNetFlow can report on the number of traffic matches for each class map in a configured QoS policy configuration.
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What should you do when you need to answer a phone call during a performance?ACall back after the performance.BAnswer it near the exit door.CTalk outside the door.DSpeak in a low voice.
单选题Construction of a new automobile parts manufacturing facility has recently been completed. Thefacility IT manager wants to deploy voice over WLAN. During your initial walkthrough， you observenumerous highly reflective surfaces on the manufacturing equipment and in the buildingconstruction itself. What potential problem exists that should be accounted for during your sitesurvey？（）ALOS modulationBMultipath distortionCRF signal absorptionDRF signal attenuationEFresnel zone impedance
单选题Which statement is true about voice VLANs？ （）AWhen the voice VLAN feature is enabled， all untagged voice and data traffic is sent through the voice VLAN.BThe voice VLAN feature is enabled by default.CThe IP phone overrides the priority of all incoming data traffic （tagged and untagged） and sets the CoS value to 0.DThe default CoS value is 1 for incoming voice and data traffic.