A network administrator wants to secure the connection between an HP ProVision and the HP VAN SDN Controller.
What is the recommended approach to securing the OpenFlow messages?
A. Use an IPsec VPN between the HP ProVision switch and the HP VAN SDN Controller to secure OpenFlow messages.
B. Use certificates to secure the traffic between the switch and controller.
C. Use sessions to OpenFlow devices that is initiated by the controller.
D. Use OpenFlow message type 5 on the auxiliary channel to secure OpenFlow messages.