A. probe request response， authentication request respo……

多项选择题WhichtwostatementsaretrueaboutvoicepacketsinaLAN？（Choosetwo.）（）

A. Voice traffic data flow involves large volumes of large packets.
B. Because a packet loss involves a small amount of data， voice traffic is less affected by packet losses than traditional data traffic is.
C. Voice carrier stream utilizes Real-Time Transport Protocol （RTP） to carry the audio/media portion of VoIP communication.
D. Voice packets are very sensitive to delay and jitter.
E. Voice packets are encapsulated in TCP segments to allow for proper sequencing during delivery.

单项选择题Refer to the exhibit. A Cisco Aironet Wireless LAN Client Adapter has been installed and configured  through the ADU on the PC. The Aironet System Tray Utility （ASTU） has been enabled during the  installation and the icon appears in the system tray area in the lower right of the desktop. What is the  significance of the icon？（）

A. It indicates that the radio of the client adapter is disabled.
B. It indicates that the client adapter is not associated to an access point or another client. 
C. It indicates that the client adapter is associated to an access point or another client， but the user is not  EAP authenticated.
D. It indicates that the client adapter is associated to an access point or another client， that the user is  authenticated if the client adapter is configured for EAP authentication， and that the signal strength is  excellent or good.
E. It indicates that the client adapter is associated to an access point or another client， that the user is  authenticated if the client adapter is configured for EAP authentication， and that the signal strength is fair.
F. It indicates that the client adapter is associated to an access point or another client， that the user is  authenticated if the client adapter is configured for EAP authentication， and that the signal strength is poor.

多项选择题WhichtwostatementsabouttheCiscoAironetDesktopUtility（ADU）aretrue？（Choosetwo.）（）

A. The Aironet Desktop Utility （ADU） can be used to establish the association between the client adapter  and the access point， manage authentication to the wireless network， and enable data encryption.
B. The Aironet Desktop Utility （ADU） and the Microsoft Wireless Configuration Manager can be used at the same time to configure the wireless client adapter.
C. The Aironet Desktop Utility （ADU） can support only one wireless client adapter installed and used at a  time.
D. The Aironet Desktop Utility （ADU） profile manager feature can create and manage only one profile for the wireless client adapter.
E. When the user selects a different profile in the Aironet Desktop Utility （ADU）， the settings for the wireless client adapter are changed only after a reboot.

单项选择题Refer to the exhibit. The command spanning-tree guard root is configured on interface Gi0 0 on both  switch S2 and S5. The global configuration command spanning-tree uplinkfast has been configured on both switch S2 and S5. The link between switch S4 and S5 fails. Will Host A be able to reach Host B？（）

A. Yes. Traffic can pass either from switch S6 to S3 to S2 to S1， or， from switch S6 to S5 to S2 to S1.
B. No. Traffic will pass from switch S6 to S5 and dead-end at interface Gi 0/0.
C. No. Traffic will loop back and forth between switch S5 and S2.
D. Yes. Traffic will pass from switch S6 to S3 to S2 to S1.
E. No. Traffic will either pass from switch S6 to S5 and dead-end， or traffic will pass from switch S6 to S3 to S2 and dead-end.

多项选择题Refer to the exhibit. Which three statements are true about trust boundaries in the campus network？  （Choose three.）（）

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