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 about voice VLANs are correct？（）
- A、Voice VLANs eliminate the need for QoS configuration
- B、Voice VLANs are used on trunk links to eliminate the need for QoS CoS markings
- C、Voice VLANs are mainly used to reduce the number of access switch ports that are used in the network
- D、Voice VLANs can be configured to forward existing CoS priorities or override them
- E、Voice VLANs are mainly used between access layer switches and distribution layer switches
- F、Voice VLANs can be configured on Layer 2 ports only
相关考题：
Which of the following can be an expected outcome of a VLAN?() A. VLANs logically divide a switch into multiple, independent switches at Layer 2.B. Trunk links can carry traffic for multiple VLANs.C. VLAN implementation significantly increases traffic due to added trunking information.D. VLANs can span multiple switches.E. VLANs typically decrease the number of switches needed
Which two statements about the use of VLANs to segment a network are true?() A. VLANs increase the size of collision domains.B. VLANs allow logical grouping of users by function.C. VLANs simplify switch administration.D. VLANs enhance network security.
Refer to the exhibit. Which of these statements correctly describes the state of the switch once the boot process has been completed?() A.As FastEthernet0/12 will be the last to come up, it will not be blocked by STP.B.Remote access management of this switch will not be possible without configuration change.C.More VLANs will need to be created for this switch.D.The switch will need a different IOS code in order to support VLANs and STP.
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
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
A switch has been configured with two vlans and is connected to a router with a trunk for inter-vlan routing.OSPF has been configured on the router，as the routing protocol for the network.Which statement about thisnetwork is true？（）A、For the two vlans to communicate，a network statement for the trunk interface needs to be added to the OSPF configuration.B、For the two vlans to communicate， a network statement for each subinterface needs to be added to the OSPF configuration.C、Direct inter-vlan communication does not require OSPFD、OSPF cannot be used if router-on-a-stick is configured on the router
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.
In an environment in which multiple VLANs have been defined on Catalyst Express 500 switches， which two statements are correct for ports that have been configured with the Smartport role of "IP Phone + Desktop"？（）A、The names of the VLANs used by the SmartPorts are case insensitiveB、The ports may belong to a configurable data VLANC、The names of the VLANs used by the Smartports are not relevantD、The ports may belong to many VLANs， depending on how many PCs are connected to each port.E、The names of the VLANs used by the Smartports are case sensitive
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
Which two statements are true about the function of CAC？（）A、CAC provides guaranteed voice quality on a link.B、CAC artificially limits the number of concurrent voice calls.C、CAC is used to control the amount of bandwidth that is taken by a call on a link.D、CAC prevents oversubscription of WAN resources that is caused by too much voice traffic.E、CAC allows an unlimited number of voice calls while severely restricting，if necessary，other forms of traffic.F、CAC solves voice congestion problems by using QoS to give priority to UDP traffic.
You need to design the VLAN scheme for the Company network. Which two statements are true about best practices in VLAN design？（）A、Routing should occur at the access layer ifvoice VLANs are utilized. Otherwise， routing should occur at the distribution layer.B、Routing should always be performed at the distribution layer.C、VLANs should be localized to a switch.D、VLANs should be localized to a single switch unlessvoice VLANs are being utilized.E、Routing should not be performed between VLANs located on separate switches.
Which two statements about the use of VLANs to segment a network are true? （）A、VLANs increase the size of collision domains.B、VLANs allow logical grouping of users by function.C、VLANs simplify switch administration.D、VLANs enhance network security.
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.
多选题Which two statements are true about the configuration of voice VLANs？（）AStatic secure MAC addresses can be configured in conjunction with voice VLANs.BPortFast is automatically enabled when voice VLANs are configured.CPortFast must be manually configured when voice VLANs are configured.DVoice VLANs are typically configured on uplink ports.EVoice VLANs are typically configured on access ports.
多选题You have configured voice VLANs on Catalyst switch R1. Which two statements are true about the operation of voice VLANs on this device？ （）AWhen the voice VLAN feature is enabled， all untagged traffic is sent according to the default CoS priority of the port.BEnabling voice VLANs enables the switch to create multiple queues for traffic that is entering a port.CWhen voice VLANs are configured on a trunk link， UplinkFast must also be enabled.DVoice VLANs are configured to enable the switch to forward frames marked with the proper CoS values over separate physical links.EEnabling voice VLANs enables the switch to forward frames with a specific 802.1P marking.
多选题In an environment in which multiple VLANs have been defined on Catalyst Express 500 switches， which two statements are correct for ports that have been configured with the Smartport role of "IP Phone + Desktop"？（）AThe names of the VLANs used by the SmartPorts are case insensitiveBThe ports may belong to a configurable data VLANCThe names of the VLANs used by the Smartports are not relevantDThe ports may belong to many VLANs， depending on how many PCs are connected to each port.EThe names of the VLANs used by the Smartports are case sensitive
单选题A switch has been configured with two vlans and is connected to a router with a trunk for inter-vlan routing.OSPF has been configured on the router，as the routing protocol for the network.Which statement about thisnetwork is true？（）AFor the two vlans to communicate，a network statement for the trunk interface needs to be added to the OSPF configuration.BFor the two vlans to communicate， a network statement for each subinterface needs to be added to the OSPF configuration.CDirect inter-vlan communication does not require OSPFDOSPF cannot be used if router-on-a-stick is configured on the router
多选题Which two statements are true about voice VLANs？（）AVoice VLANs are only used when connecting an IP phone and a host to distinct switch portsBAccess ports that are configured with voice VLANs will always trust the CoS that is received from IP phonesCAccess ports that are configured with voice VLANs may or may not override the CoS value that is received from an IP phoneDVoice VLANs are configured using the switchport voice vlan vlan-ID interface configuration commandEVoice 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 portFEnabling Voice VLAN on a switch port will automatically configure the port to trust the incoming CoS markings
多选题You need to design the VLAN scheme for the Company network. Which two statements are true about best practices in VLAN design？（）ARouting should occur at the access layer ifvoice VLANs are utilized. Otherwise， routing should occur at the distribution layer.BRouting should always be performed at the distribution layer.CVLANs should be localized to a switch.DVLANs should be localized to a single switch unlessvoice VLANs are being utilized.ERouting should not be performed between VLANs located on separate switches.
多选题Which two statements about voice VLANs are correct？（）AVoice VLANs eliminate the need for QoS configurationBVoice VLANs are used on trunk links to eliminate the need for QoS CoS markingsCVoice VLANs are mainly used to reduce the number of access switch ports that are used in the networkDVoice VLANs can be configured to forward existing CoS priorities or override themEVoice VLANs are mainly used between access layer switches and distribution layer switchesFVoice VLANs can be configured on Layer 2 ports only
多选题Which two statements are true about the function of CAC？ （）ACAC provides guaranteed voice quality on a link.BCAC artificially limits the number of concurrent voice calls.CCAC is used to control the amount of bandwidth that is taken by a call on a link.DCAC prevents oversubscription of WAN resources that is caused by too much voice traffic.ECAC allows an unlimited number of voice calls while severely restricting， if necessary， other forms of traffic.FCAC solves voice congestion problems by using QoS to give priority to UDP traffic.
单选题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
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.