Software Defined Networking (SDN) may have started as the separation of the control plane and the data plane, but the true power lies in the ability to communicate with the network through well defined interfaces using standard protocols. This session provides a brief intro to SDN in general, and more specifically to OpenDaylight, an open source platform for programmable SDN. Next we dive into network programmability, including why we need it and the role of NETCONF, YANG, and RESTCONF. Then we put the theory into practice as we install OpenDaylight as use it a platform for programming a sample network.