单项选择题 Inorderforacontroller-basedaccesspointtobeallowedtoparticipateinaggressiveloadbalancing，it musthaveheardtheclientwithinhowmanyseconds？（）

单项选择题 A mobility group is created by a Cisco WLCM and 4402 Series Wireless LAN Controller. A client thatis anchored on the Cisco WLCM roams to an access point on the 4402 controller. You then run adebug command on the 4402 controller. Which message would best describe the establishment of the tunnel from the foreign controller’sperspective？（）

单项选择题 You are charged with implementing a secure wireless installation which will provide Internet accessto client devices but will not allow communications between wireless clients. In addition to implementing PSPF or peer-to-peer blocking on the wireless side. Which of the following actions should you perform on the wired infrastructure？（）