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


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1.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.

2.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.

3.單項選擇題

Refer to the exhibit.
 Why does the trust state of interface FastEthernet 0/3 show "not trusted"?  ()

A.DSCP map needs to be configured for VOIP.
B.ToS has not been configured.
C.ToS has been misconfigured.
D.The command mls qos needs to be turned on in global configuration mode.
E.There is not a Cisco Phone attached to the interface.

4.單項選擇題

Refer to the exhibit.
 What statement is true about the configuration on switch CAT1?()

A.The configuration establishes policed DSCP on ports Fa0/11 and Fa0/12 with values ranging  from 8 to 56.
B.The configuration overrides 802.1p priorities on packets entering ports Fa0/11 and Fa0/12 with  a value of 48.
C.Untagged Port VLAN ID (PVID) frames will carry voice traffic on VLAN 40.
D.Two IP phones with the MAC addresses of 0008.8595.d1a7 and 0007.8595.d2b7 are  connected to CAT1 ports Fa0/11 and Fa0/12, respectively.
E.Security violation shutdown mode has been activated for ports Fa0/11 and Fa0/12.
F.The configuration overrides the Quality of Service value in packets entering ports Fa0/11 and  Fa0/12 with a value of 45.

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