Which three statements are true about implementing wireless LANs in the Company network using  Cisco devices？（）

• A、 Antenna power is a relative value reference to dBi.
• B、 LWAPP allows encrypted communications between lightweight access points and WLAN  controllers.
• C、 Characteristics of antennas are directionality， gain， and polarization.
• D、 Power over Ethernet （PoE） is only available when a WLAN controller is integrated into the  network.
• E、 The WLAN solution Engine （WLSE） is used to control lightweight access points.
• F、 One of the advantages of the lightweight WLAN solution is that the devices act indepently.