What is the difference between npv and sdn

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Learn how your comment data is processed. Close Search. SDN Controller Comparisons:. Trending Now. Technical Documentation Kubernetes Explained. Part 7: Comparison and Product Rating. Part 8: Tungsten Fabric. Leave a Reply Cancel Reply. Let us turn your Business Capabilities into a Competitive Advantage. Back Next. This kind of functionality — especially the associated rules and policies — changes over time, sometimes rapidly.

It also explains the emphasis on programmable network control and the use of SDN controllers with a purview over entire infrastructures. SDN provides a better fit in such situations, where numerous characteristics demand a more flexible and dynamic approach.

These situations include the following:. Further, conventional networks impose limitations that hamper designers' efforts to keep up with the ever-changing landscape of users, resources, services and applications. The first such limitation is posed by complexity and effort. Bolstering capacity or capability means adding and moving devices or crafting network-wide policy. The work involved is complex and time consuming, and requires manual access to individual devices and consoles.

Change is a heavy burden. Next, the established practice of oversubscribing to links means that scalability becomes a real challenge. This is exacerbated by the dynamic traffic patterns typical in virtualized networks, which vary widely depending on the kinds of workloads present as well as by usage and communication patterns.

Finally, conventional networks must adhere to the product cycles and proprietary interfaces typical in vendor-specific environments. Network operators will often be stymied in their attempts to tailor and customize their networks, especially programmatically. Ultimately, SDN rests on the notion that network control can be divorced from network infrastructure and physical devices.

By applying programming and automation to network control, network operators can define, manage and manipulate logical networks directly and dynamically. NFV, by contrast, is all about the network functions that must be performed at all levels and stages of a network — at the periphery, boundary and core — to accept, forward, shape and filter network traffic as it courses through any given infrastructure.

Today, NFV falls under the aegis of ETSI , the European Telecommunications Standards Institute, which seeks to define and maintain "globally applicable standards for information and telecommunications technologies. A third piece in this series will share educational resources to help interested IT professionals improve their understanding of SDN and NFV and develop skills in these important topic areas.

Ed Tittel is a plus year IT veteran who's worked as a developer, networking consultant, technical trainer, writer and expert witness.