单项选择题 Whichimplementphaseservicecomponentconsistsofpreparingformigration，excutinganetworkmigrationplan，andcompletingmigrationtestcases？（）

单项选择题 WhatdoesaCiscoUnifiedWirelessIPPhone7921Gdeploymentrequire（）？

单项选择题 Ciscorecommendsadecibelreferencedto1milliwattsignallevelforthecoveragecelledgeatthepredetermineddataratethatisneededtosupporttheVoWLANdeviceandcallcapacityrequirements.WhatisthatsignallevelvalueforCiscoUnifiedWirelessIPPhones7920，7921G，and7925G？（）A.-65dBmB.-67dBmC.-69dBmD.-70dBm