多项选择题 When configuring a WLAN controller for a voice application using Cisco 7920 wireless IP phones. Which two general control settings should you select？ （）

单项选择题 Clients using Cisco-LEAP and EAP-FAST authentication are having no problems logging on to the wirelessnetwork， but clients using PEAP are failing to log on. Which situation would result in this type of problem？（）

单项选择题 You review the Failed Attempts logs on an AAA server and find： "unknown network access server error." Which failure could produce this error？（）