单项选择题 A Cisco Wireless Location Appliance has been added to track RFID tags placed on laptops beingused in a school.Classrooms at the school have concrete block walls. During testing，you discoverthat the accuracy of the system needs to be improved.You decide to edit the map in the Cisco WCS to add the interior walls. How many interior walls can you add to improve the accuracy of thelocation appliance？（）

单项选择题 You are troubleshooting a problem with a Cisco 7920 wireless IP phone on a standalone WLAN.The phone rings but， when you answer， the call is dropped. What may cause this problem？（）

单项选择题 TheCiscoWirelessLocationApplianceprovidesanaudittrailforeachdevicetrackedforuptohow manydays？（）