单项选择题
A.failure of the wireless client and AAA server handshake
B.supplicant authentication failure
C.AAA client and AAA server handshake
D.Wrong password used by the supplicant
单项选择题 You are using ADU and are authenticated and associated to an access point. However， you are unable to obtain an IP address. Which of these has caused this problem？（）
单项选择题 You are configuring a wireless LAN controller for QoS. Which 802.11e user priority tag should you apply to voice applications？（）
单项选择题 A client roams from H-REAP AP1 to H-REAP AP2. The client is unable to associate to H-REAP AP2.H-REAP AP2 has six other clients associated to it， which continue to pass traffic. What has causedthis problem？（）