Final answer:
This question is about the use of a declarative SDN model in automation and the different technologies or protocols that can be used for it.
Step-by-step explanation:
The subject of this question is Computers and Technology. The question is asking about a specific aspect of networking called automation, which involves the use of a declarative SDN model. In this model, the instructions sent to the controller are not detailed, allowing the devices in the data plane to make more network decisions. The options provided (OnePK, OpenFlow, OpFlex, and NETCONF) are different technologies or protocols that can be used for automation in SDN.