What is the default NMSP echo interval between Cisco MSE and a Wireless LAN Controller?

An engineer implemented the CPU ACL on your Cisco 5520 Series Wireless LAN Controller, and the controller is no longer manageable via the network.
What must be changed on this CPU ACL to enable it to manage the controller again?
An engineer must configure a Cisco WLC to support Cisco Aironet 600 Series OfficeExtend APs. Which two Layer 2 security options are supported in this environment? (Choose two.)
An IT administrator is managing a wireless network in which most devices are Apple iOS. A QoS issue must be addressed on the WLANs. Which configuration must be performed?
An administrator receives reports of many interferes in the wireless network and wants to get these interferes' location from the maps in Cisco Prime Infrastructure. When looking at the floor plans/maps, the administrator does not see any interferes but can see all wireless clients located successfully. What must be configured to get the location?