By dividing the control plane from the data plane, SDN offers the flexibility to view the entire data plane infrastructure as a resource that can be configured and controlled by an upper layer control plane.

The type of resource which makes use of SDN to control an upper layer control plane is known as:

Based on the given question, we are asked to state the type of resource which makes use of SDN to control an upper layer control plane and how it is viewed for it it function effectively.

With this in mind, we can see that this can only be effectively done with a virtual resource so that the separating data plane can be effective in hiding the device data layer and test the other variables.

Read more about virtual resource here:

link

Virtual

By dividing the control plane from the data plane, SDN offers the flexibility to view the entire data plane infrastructure as a Virtual resource that can be configured and controlled by an upper layer control plane.

Explanation:

The separating data plane (SDN) is used by users to hide the specifics of a device data layer so that all devices would be treated equally thereby representing the entire data plane as a  virtual abstract layer thus enhancing network efficiency.

The SDN work mainly on the Control and data plane separating both of the planes. Also, the SDN make networks more agile and flexible.

SDN provides the flexibility to view the entire data plane infrastructure as a

virtual resource that can be configured and controlled by an upper layer

control plane.