Software Defined Networks and Network Functions Virtualisation (SDN NFV) are two concepts that, from now on and in the coming years, will revolutionise the way telecommunications networks operate in the world, responding to changes in the growing demand for user traffic and companies. "The explosion of devices. Software Defined Networks (SDN) and Network Functions Virtualisation (NFV) are two concepts that, from now on and in the coming years, will revolutionise the way telecommunications networks operate in the world, responding to changes in the growing demand for user traffic and companies. The explosion of mobile devices and applications as well as the arrival of services in the cloud are some of the trends that are driving companies to re-examine traditional network architectures and to assess those that enable them to be more agile in the use of software and virtualisation. It is increasingly complex to meet today's market requirements with traditional network architectures. Faced with IT department budgets, companies are trying to make the most of their networks using device-level management tools and manual processes. Operators, on the other hand, face the challenges of today's networks, which have been developed to meet the needs of today's users, related to better mobility and bandwidth, which means a meet the needs of its customers and achieve a return on investment (ROI) in the short term. The Software Defined Networks (SDN) technologies has to be defined by a controller, which will centre upon intelligence software all functions of network layers within the same device, making the functions of programmable network a more agile and easily. On the other hand, Network Functions Virtualisation (NFV) is another concept of network architecture that proposes to use techniques related to IT virtualisation. NFV consists of replacing specialised hardware with virtual machines, which can perform different processes on high-capacity servers, switches and storage, or on cloud infrastructure, resulting in more economical and sustainable solutions, giving you the option of working with different manufacturers for network administration. Currently, service providers who have their own networks are under pressure because of the urgency of delivering services. As the cloud moves forward-parallel to the evolution of an information-driven, connected world-customer expectations increase even more. The value x time ratio is a decisive metric. And, faced with this equation, experienced service providers are using SDN NFV (software-defined networks) and (network function virtualisation) to change the economic variables of their business. OTT Providers and the nimble service providers come out ahead with cloud and virtualisation technologies that enable them to quickly and instantly launch new solutions and capabilities to anticipate customer needs. If the new products are a success, you can expand them immediately and capture their maximum value. Thus, value migrates to fast innovations, while conventional network connectivity becomes more and more a commodity. The point is that these companies need to adapt to this new reality. However, if the future is to take advantage of these functions quickly to capitalise on innovative ideas, implementing them successfully is another story. The main infrastructure of the networks and services is designed and implemented in a rigid and manual model with slow changes to start operating. It requires huge investments and is difficult to change in the middle of the process or after its implementation. These trends have created a gap of innovation between customer expectations and what network providers could deliver.
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