In order to enhance worker productivity， a Cisco wireless network has been implemented at all locations. Which three statements regarding WLAN are true？（）
- AA WLAN client will operate in half-duplex mode.
- BThe Aironet 1230 access point is an example of an access point that operates solely as a lightweight access point.
- CAd hoc mode allows mobile clients to connect directly without an intermediate AP.
- DWLANs are designed to share the medium and can easily handle an increased demand of channel contention.
- EA lightweight AP receives control and configuration from a WLAN controller to which it is associated.
- FAnother term for infrastructure mode is independent service set （IBSS）.