单项选择题 You have been called upon to add location-based services into an existing controller-basedwireless design which primarily encompasses handheld devices such as barcode scanners andCisco 7920 wireless IP phones. In which mode should you deploy the additional access points toachieve the density required without excessive co-channel interference？（）

单项选择题 A Cisco Aironet 1020 controller-based access point has been connected to a Catalyst 3550-24PWR Switch. However， when it is powered up， the access point fails. What has caused this problem？（）

单项选择题 Whichwirelessservicecomponentisassociatedwithmaintaininghistoricalandcurrent information abouttheWLANsolution？（）