单项选择题
A.debug dhcp enable
B.debug dhcp status enable
C.debug dhcp packet enable
D.enable debug dhcp packet
单项选择题 You are troubleshooting a one-way call problem with a cisco 7920 wireless ip phone on a standalone wlan. What may cause this problem？（）
单项选择题 Whatisthemaximumnumberofwirelesscontrollersthatthehighest-endciscowcsservercanmanage？（）
单项选择题 Intheciscowcs，howmanydaysisdataavailablefortrendinganalysis？（）