SDN and NFVs are both very much alike and mostly work on the same premise. They are both cost-effective. Both leverage the concept of abstraction in their methods. Both allow users to interact with recourses and differ in some aspects.
What are SDN Architecture Layers
Software-defined networks (SDN) are another type of computing. SDN refers to the new and upcoming system of networking. This infrastructure is not only manageable but is also adaptive and reliable. It uses open-source APIs to manage and control the systems centrally. It gives a holistic approach to the already commonly used networking systems. This type of infrastructure helps run the whole underlying system in a centralized and composed fashion.