Which two features or capabilities are valid options for both an Autonomous WLAN solution and a  Lightweight WLAN solution？ （）

• A、 PoE capability
• B、 Use of Cisco Secure Access Control Server （ACS） for security
• C、 Cisco IOS software for configuration
• D、 Cisco Wireless Control System （WCS） for management
• E、 Use of a Cisco Wireless Location Appliance location for tracking