单项选择题 By default， on the WLAN controller for a voice application using Cisco 7921 wireless IP phones. What is the percentage of RF bandwidth that can be dedicated to the phones？（）

单项选择题 The IOS of a North American Cisco Aironet 1130AG Series standalone access point has becomecorrupt. You must therefore reload the TFTP firmware. Before you press and hold the MODEbutton. You should verify that the file name is which of the following？（）

单项选择题 Intheoperatephase，providingandmaintainingreliable，currentinformationabouttheWLAN system hardware，software，andapplicationspertinenttothesystem’sindividualcomponentsandattributesispartofwhichservicecomponent？（）