Which two statements about the Cisco Open SDN Controller are true? (Choose two.) 

Answer options:

A. It is a commercial distribution based on the OpenFlow controller.
B. Your own, new network service functions can be added via Java APIs.
C. Security is enforced by using the Open Services Gateway Initiative framework.
D. It can be used in multivendor environments.
E. The controller is available as an appliance only.

AB

The Cisco Open SDN Controller is a commercial distribution of OpenDaylight that delivers business agility through automation of standards-based network infrastructure. It abstracts away the complexity of managing heterogeneous network environments to improve service delivery and reduce operating costs. As open-source-based software, the Open SDN Controller continuously advances through ongoing innovation and support of the OpenDaylight community. Reference: http://www.cisco.com/c/en/us/products/cloud-systems-management/open-sdn-controller/index.html