SDN and NFV: A State-of-the-Art Comparative Study of Architectures, Techniques, and Application

Abstract

Software Defined Networking (SDN) and Network Function Virtualization (NFV) are reshaping the landscape of modern telecommunication through their flexible and programmable approaches to network management. The integration of these technologies has gained significant attention due to the potential to enhance scalability, efficiency, and service delivery across various network environments. SDN enables centralized control and dynamic configuration, while NFV replaces traditional hardware-based network functions with virtualized software components. However, challenges remain in areas such as security, interoperability, and deployment complexity. This review paper explores the state-of-the-art SDN and NFV architectures, benefits, and limitations of both SDN and NFV from a comparative perspective. It highlights the integration of SDN and NFV and their roles in 5G and large-scale networks. The paper also identifies existing gaps and proposes directions for future research to optimize the integration of these technologies and fully realize their potential in next-generation networking.