單項選擇題

The Company network is displayed in the following topology exhibit:

Workstation 1 traffic is set for cos 5 and the switch CompanyA sends workstation 1 traffic to the  switch CompanyB. However, not all of the traffic from Switch CompanyA is from workstation 1.  Switch CompanyA configurations Switch CompanyB Configuration:  
mlsqos mls qos  
interfacefa0/1 interface fa0/1  
switchportmode trunk switchport trunk mode  
switchporttrunk encapsulation dot 1q switchport trunk encapsulation dot 1q  
switchporttrunk native vlan 1 switchport trunk native vlan 1  
Frames from Workstation 1 are given the rightful priority through Switch CompanyA, but Switch CompanyB doesn’t reciprocate, and treats Workstation 1 frames as if they have no precedence. Which of the following actions will prioritize traffic from Workstation 1?()

A. Configure qos all command under Switch CompanyB fa0/1 interface.
B. Configure mls qos trust cos command under Switch CompanyB fa0/1 interface.
C. Configure mls qos trust cos 5 command under Switch CompanyB fa0/1 interface.
D. Configure qos cos 5 command under Switch CompanyB fa0/1 interface.
E. Configure mls qos trust cos command under Switch CompanyA fa0/1 interface.
F. Configure qos cos 5 command under Switch CompanyA fa0/1 interface.


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1.多項選擇題

VOIP is being implemented in the Company network and you need to assess the need for QoS.  
Which of the following network problems would indicate a need to implement QoS features?()

A.Mis-routed packets  
B.Excess jitter
C.Delay of critical traffic
D.Packet loss due to congestion
E.Data link layer broadcast storms
F.FTP connections unsuccessful

3.單項選擇題

Jitter is causing problems with the VOIP application in the Company network. 
What causes  network jitter?()

A.Variable queue delays
B.Packet drops
C.Transmitting too many small packets
D.Compression

4.單項選擇題

Refer to the exhibit. A trunk link is connected between switch A_SW and switch D_SW. Based on  the configuration shown in the exhibit, 
how would the traffic coming from the switch A_SW be  managed? ()

A.The trunk port Fa0/1 on switch A_SW will trust allCoS values on the frames coming from the IP  phone.
B.The trunk port Fa0/1 on switch A_SW will trust allCoS values on the frames received on the IP  phone.
C.The trunk port Fa0/1 on switch D_SW will trust allCoS values on the frames coming from port  Fa0/1 on A_SW.
D.The trunk port Fa0/1 on switch D_SW will trust allCoS values on the frames received on the  A_SW switch port Fa0/4.
E.The trunk port Fa0/1 on switch D_SW will trust allCoS values on the frames received on the IP  phone port.

5.單項選擇題

Refer to the exhibit. 
Which statement is true when voice traffic is forwarded on the same VLAN  used by the data traffic? ()

A.The voice traffic cannot be forwarded to the distribution layer.
B.The voice traffic cannot use 802.1p priority tagging.
C.Port security cannot be enabled on the switch that is attached to the IP phone.
D.Quality of service cannot be applied for the voice traffic.

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