单项选择题
A. Reduction of processing in wireless controllers
B. Distributed approach to authentication， encryption， and policy enforcement
C. Access point discovery， information exchange， and configuration
D. Provides security by blocking communication between access points and wireless clients
E. None of the other alternatives apply.
单项选择题 Study the exhibit shown below carefully. 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 as shown： What is the significance of this icon？ （）
多项选择题 Which three statements are true about implementing wireless LANs in the Company network using Cisco devices？（）
多项选择题 Under which three conditions does a client initiate roaming between wireless cells in the Company WLAN？ （）