问题：

[多选] 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.