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.


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1.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.

3.多項選擇題

Refer to the exhibit. 
Which three statements are true about trust boundaries in the campus  network?()

A.Classification and markingoccur using 802.1ab QoS bits before reaching the trust boundary.  
B.A device is trusted if it correctly declassifies packets. 
C.A device is trusted if it correctly classifies packets.
D.Network trust boundaries are automatically configured in IOS version 12.3 and later.  
E.The outermost trusted devices represent the trust boundary.
F.For scalability, classification should be done as close to the edge as possible.

4.多項選擇題

Refer to the exhibit. 
Which two statements are true about the required switch configurations to  support a voice VLAN?()

A.CDP must be disabled on the switch port to prevent interference between CDP messages and  voice traffic.
B.Port security cannot be configured on a port that is configured for a voice vlan.
C.Static secure MAC addresses should be configured on voice vlan ports to prevent access by  devices other than IP phones.
D.CDP must be enabled on the switch port to allow configuration information to be passed to the  IP phone.
E.Portfast must be enabled on the switch port.
F.802.1x authentication cannot be configured on a port configured for a voice vlan.

5.單項選擇題

You have been tasked with setting a trust boundary on the Company network.
 What is the basic  function of this trust boundary?()

A. Trust boundaries are points in the network where Layer 2 CoS markings are converted to Layer  3 DSCP or IP precedence markings.
B. Trust boundaries are a point in the network where QoS functionality begins and ends.
C. Trust boundaries determine whether certain types of traffic can pass.
D. Trust boundaries are a point in the network where decisions about CoS markings on incoming  packets are made.
E. None of the other alternatives apply

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