单项选择题 Inorderforacontroller-basedaccesspointtobeallowedtoparticipateinaggressiveloadbalancing，itmusthaveheardtheclientwithinhowmanyseconds？（）

单项选择题 A mobility group is created by a cisco wlcm and 4402 series wireless lan controller. A client that is anchored on the cisco wlcm roams to an access point on the 4402 controller. you then run a debug command on the 4402 controller. Which message would best describe the establishment of the tunnel from the foreign controller’s perspective？（）

单项选择题 You are charged with implementing a secure wireless installation which will provide internet  access to 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？（）