单项选择题
WhenplanningforvoicedeploymentswiththeCiscoUnifiedWirelessIPPhone7921GhandsetinamultifloorbuildingwithaWLANthatoperatesatan11MB/sdatarate，howmanydecibelsreferencedto1milliwattofsame-channelseparationarerecommendedbetweenfloors？（）A.13dBmB.19dBmC.25dBmD.31dBm
单项选择题 Howcanmobiledevicesandwirelessnetworksbesecured？（）
单项选择题 AcomputerisconnectedtothenetworkthroughaNIC，whichhasauniqueassignmentthatiscalledtheEthernetMACaddress.WhichlayeroftheOSImodeldoestheMACaddressusetocommunicatewiththenetwork？（）
单项选择题 WhichCiscoCatalystswitchesfitintheaccessarea？（）
