Which two of these statements best describe the benefits of Cisco’s wireless IDS functionality？ （Choose two.）  （）

• A、 AirDefense for wireless IDS is required by autonomous APs.
• B、 2.40Hz CK management can monitor both 802.11 and non-802.11 CK interference.
• C、 APs only monitor the RF channels that are servicing the clients.
• D、 Cisco or CCX compatible client cards can extend the CK IDS service for autonomous APs.
• E、 Autonomous APs must be dedicated IDS sensors while lightweight APs can combine client traffic and RF monitoring.