單項選擇題What is the goal of QoS in a network？ （）

A.prevent packets from being dropped
B.increase available bandwidth
C.reduce hardware errors
D.provide predictable network service
E.eliminate propagation delay
F.eliminate jitter and packet loss


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1.單項選擇題What are the steps for configuring stateful NBAR for dynamic protocols？ （）

A.use the command ip nbar protocol-discovery to allow identification of stateful protocols. Use the command ip nbar port-map to attach the protocols to an interface
B.use the command match protocol rtp to allow identification of real-time audio and video traffic. Use the command ip nbar port-map to extend the NBAR functionality for well-known protocols to new port numbers
C.use the command match protocol to allow identification of stateful protocols. Use the command ip nbar port-map to attach the protocols to an interface
D.configure a traffic class. Configure a traffic policy. Attach the traffic policy to an interface. 
E.configure video streaming. Configure audio streaming. Attach the codec to an interface

3.多項選擇題Which two statements regarding the Wireless LAN Solution Engine （WLSE） are true ？（）

A.to support fault and policy reporting， the WLSE requires a Wireless Control System （WCS）
B.when WLSE detects an AP failure， it automatically increases the power and cell coverage of nearby APs
C.WLSE requires the 2700 location appliance to offer location tracking
D.WLSE can locate rogue APs and automatically shut them down
E.WLSE configuration is done using the command line interface （CLI） or a WEB based template

4.多項選擇題Which three methods would help prevent critical network-traffic packet loss on high speed interfaces？（）

A.policy routing
B.increase link capacity
C.WRED
D.CBWFQ
E.LFI
F.WFQ

5.多項選擇題Which two statements best describe enhanced wireless security encryption？（）

A.TKIP protects RC4 encryption keys
B.CKIP and TKIP protect AES encryption keys
C.TKIP encryption is more processor intensive than AES encryption is
D.WPA requires TKIP encryption， whereas WPA2 supports AES encryption
E.WPA requires AES encryption， whereas WPA2 supports TKIP encryption