Which statement is true regarding SDN and NFV?

The correct understanding of the relationship between Software Defined Networking (SDN) and Network Functions Virtualization (NFV) lies in recognizing that while they are interconnected, they are not completely the same nor are they entirely separate. The significant distinction is that SDN focuses on the programming and management of network hardware through a centralized control model, allowing for dynamic management of network resources, while NFV centers on virtualizing various network functions that traditionally ran on proprietary hardware into software components that can run on standard server hardware. This separation allows for greater flexibility and efficiency in network operation and management.

SDN and NFV complement one another in modern networking architecture. For instance, SDN can help manage and automate the deployment of virtualized network functions, while NFV provides the means to deploy these functions flexibly across hardware. One emphasizes control and management, while the other emphasizes the virtualization of network services.

Understanding this relationship clarifies why the chosen answer asserts that they are completely different concepts; it highlights the specific focus and objectives of each approach, rather than suggesting they are the same entity or entirely oppositional concepts.