Which option correctly identifies the four main menus of a Cisco Wireless Control System （WCS）？ （）

A. Traffic to be policed is identified using the control-plane global configuration command.
B. The control-plane global configuration command enters the Cisco Modular QoS CLI （MQC） mode.
C. The control-plane global configuration command enters the control-plane configuration mode. 
D. Traffic to be policed is identified using the control-plane interface configuration command.
E. The control-plane interface configuration command enters the Cisco Modular QoS CLI （MQC） mode.
F. The control-plane interface configuration command enters the control-plane configuration mode.

A. Type 1
B. Type 2
C. FXS
D. FXO
E. E&M

A. On congested links， all forms of traffic will require some form of QoS.
B. All traffic types and requirements should be examined to determine the number of traffic classes required.
C. In the implementation of link efficiency mechanisms on links that typically transport relatively large packets， header compression will be most efficient.
D. In the implementation of link efficiency mechanisms on links that typically transport relatively small packets， header compression will be most efficient.
E. In the implementation of link efficiency mechanisms on links that typically transport relatively small packets， payload compression will be most efficient.
F. Payload compression provides more available bandwidth and reduces processing delay time.