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 have caused this problem？（）

单项选择题 A Cisco WCS version 4.0 has been installed on a server with a dual Pentium 3.0 GHz processor， 4GB RAM， and an 80 GB hard drive. A location appliance has been incorporated into the network and isbeing monitored by the Cisco WCS. There are 3000 devices to be tracked but not all of them are beingtracked on the Cisco WCS. What can be done to correct the problem？（）

单项选择题 You are troubleshooting a problem with a Cisco 7920 wireless IP phone that is causing the phoneto drop calls. The problem appears to be a roaming bandwidth issue. In order to verify what kindof issue it is， you decide to increase the bandwidth reserved for roaming on the WLAN controllerto the maximum. What level do you set the bandwidth to？（）