Which two statements about wireless LAN controllers are true?

Which two statements about wireless LAN controllers are true? (Choose two.)
A. They can simplify the management and deployment of wireless LANs.
B. They rely on external firewalls for WLAN security.
C. They are best suited to smaller wireless networks.
D. They must be configured through a GUI over HTTP or HTTPS.
E. They can manage mobility policies at a systemwide level.

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