单项选择题 OnaWLANcontroller，whatisthedefaultroamingbandwidthpercentagereservedforvoice clients？（）

单项选择题 WhatisthemaximumrecommendedheightatwhichaCiscoAironet1000Seriescontroller-basedaccesspointshouldbemountedwhenusingintegratedantennas？（）

单项选择题 You are using ADU and are authenticated and associated to an access point. However，you areunable to obtain an IP address. Which of these has caused this problem？（）