單項選擇題

Refer to the exhibit. 
What is the effect when the switchport priority extend cos 3 command is  configured on the switch port interface connected to the IP phone?()

A. The IP phone is enabled to override with aCoS value of 3 the existing CoS marking of the PC  attached to the IP phone.
B. The switch will no longer tag incoming voice packets and will extend the trust boundary to the  distribution layer switch.
C. RTP will be used to negotiate aCoS value based upon bandwidth utilization on the link.  
D. Effectively, the trust boundary has been moved to the PC attached to the IP phone.
E. The computer is now establishing theCoS value and has effectively become the trust boundary.


您可能感興趣的試卷

你可能感興趣的試題

1.單項選擇題

Refer to the exhibit. 
Which Catalyst switch interface command would be used to cause the switch  to instruct the phone to override the incoming CoS from the PC before forwarding the packet to the  switch?()

A. mls qos cos 2 override
B. switchport priority extend cos 11
C. switchport priority extend trust
D. switchport priority extend none
E. mls qos cos 2
F. switchport priority extend cos 2

2.多項選擇題

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.

3.單項選擇題

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.

4.單項選擇題

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.

5.多項選擇題

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.

最新試題

What is the configured priority value of the Vlan105’s group on DS2 ?()

題型:單項選擇題

Refer to the exhibit. Switch 15 is configured as the root switch for VLAN 10 but not for VLAN 20. If the STP configuration is correct, what will be true about Switch 15?()

題型:單項選擇題

What must be the same to make multiple switches part of the same Multiple Spanning Tree (MST)?()

題型:單項選擇題

Refer to the exhibit. What does the command channel-group 1 mode desirable do? () 

題型:單項選擇題

How are STP timers and state transitions affected when a topology change occurs in an STP environment?()

題型:單項選擇題

Refer to the exhibit. Initially, LinkA is connected and forwarding traffic. A new LinkB is then attached between SwitchA and HubA. Which two statements are true about the possible result of attaching the second link?()

題型:多項選擇題

Refer to the exhibit. Which statement is true about the output?()

題型:單項選擇題

If G1/0/1 on DS1 is shutdown, what will be the current priority value of the Vlan105’s group on DS1 ?()

題型:單項選擇題

Refer to the exhibit. On the basis of the output of the show spanning-tree inconsistentports command, which statement about interfaces FastEthernet 0/1 and FastEthernet 0/2 is true?()

題型:單項選擇題

What two things will occur when an edge port receives a BPDU?()

題型:多項選擇題