Which two statements about the wireless control system （WCS） are true？（）

A、the Cisco WCS is designed to support 1500 Cisco WLAN controllers and up to 50 APs

B、the Cisco WCS runs on a dedicated network device such as the Cisco 2700 network appliance

C、the Cisco WCS runs on various windows and Linux platforms

D、the Cisco WCS screen displays four main menu sheet tab consisting of Monitor， Configure， Security， and Alam

E、the Cisco WCS uses the SNMP protocol to communicate with the controllers