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.
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Refer to the exhibit.
Which statement is true about the configuration that is shown？ （）
A. Untagged ingress traffic will be dropped.
B. Ingress traffic from the host will be tagged with theCoS value of 5.
C. Tagged and untagged ingress traffic will be carried on VLAN 1.
D. Untagged ingress traffic will be marked with the default CoS value of the port.
The Company network administrator has entered the "auto qos voip cisco-phone" command on switch R1.
What does this command do？（）
A.It disables the trust boundary feature because the switch knows a Cisco IP phone is attached.
B.The switch assigns a CoS value of 5 to incoming packets.
C.If a Cisco IP phone is attached and removed， the switch continues to trust the CoS values as long as the switch is not rebooted.
D.It turns on STP to see if a Cisco IP phone is attached.
E.If a Cisco IP phone is attached， the switch trusts the CoS.
F.None of the other alternatives apply.
Refer to the exhibit.
Which three statements are true about the voice VLAN configuration of the Catalyst switch？ （）
A.The packet priority received from a device that is connected to the phone will be unmodified.
B.The packet priority received from a device that is connected to the phone will be overridden.
C.Incoming CoS values in packets from the connected phone will be left unmodified.
D.Packets without aCoS value that is set by the phone will be set to a value of 5.
E.Incoming CoS values in packets from the connected phone will be reset to a value of 5.
F.Packets without aCoS value that is set by the phone will be set to the default CoS value.
The Cisco AutoQoS feature is being used throughout the Company VOIP network.
Which three statements about this feature are true？（）
A.The "mls qos" global configuration command must be entered before configuring AutoQoS.
B.CEF must be enabled.
C.The "no auto qos voip" command is used to disable Cisco AutoQos and revoke all configurations generated by Cisco AutoQos.
D.CDP must be enabled.
E.SNMP must be enabled.
Refer to the exhibit.
What is the effect on the trust boundary of configuring the command mls qos trust cos on the switch port that is connected to the IP phone？（）
A.Effectively the trust boundary has been moved to the IP phone.
B.RTP will be used to negotiate aCoS value based upon bandwidth utilization on the link.
C.The switch is rewriting packets it receives from the IP phone and determining theCoS value.
D.The switch will no longer tag incoming voice packets and will trust the distribution layer switch to set theCoS.
E.The host is now establishing theCoS value and has effectively become the trust boundary.
最新試題
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