单项选择题 Theciscowirelesslocationappliancecantrackuptohowmanydevices？（）

单项选择题 Youaretroubleshootingaproblemwithacisco7920wirelessipphoneonastandalonewlan.thephoneringsbut，whenyouAnswer，thecallisdropped. Whatmayhavecausedthisproblem？（）

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，4 gb ram，and an 80 gb hard drive. a location appliance has been incorporated into the network and is being monitored by the cisco wcs. there are 3000 devices to be tracked but not all of them are being tracked on the cisco wcs. What can be done to correct the problem？（）