Software- Defined Networking
What's more, traditional networks are tightly coupled with highly expensive network elements that don't offer any kind of openness or ability to customize internals. To deal with such issues, open source communities came together to define a networking approach for future. And that's how the concept of SDN came to life. As an approach, SDN is evolving over the time. Talking of implementation, as its name suggests, SDN is implemented through software. Since SDN is a software layer, it provides advantages such as reduced manual efforts, dynamic scalability, and central management of network devices. To understand better, consider the following: In traditional networks, each network device in enterprise or data centre is configured manually, something which is not only error-prone, but also requires manual reconfiguration (a highly tedious and time-consuming task) whenever there's a change in network. SDN, on the other hand, aims to have a holistic view of the network - you can configure/monitor/troubleshoot network devices with ease from central point, avoiding a lot of manual effort, hence saving time and money in the process.
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- What is Software Defined Networking? The Future of SDN. | E-Pulse Blog
The particular one being promoted was OpenFlow; a standardized communications interface protocol. The Concept of SDN Software-defined networking aims to provide companies with stable but adaptable Sdn architectures that are able to handle the complex systems which are a mix of cloud and in-house infrastructure. SDN achieves this by manipulating the underlying network infrastructure to separate forwarding functions and network control. As such, network control becomes programmable and can be manipulated using the software. The implication is that greater agility is realized, and the network administrator can dynamically adjust the flow of traffic across the network depending on the need. Benefits of Software Defined Networking Over the past decade, traffic patterns in business have undergone dramatic changes due to the heightened use of mobile devices. This has called for more and more systems to be moved to the cloud. Therefore, when Ethernet switches could facilitate the traditional and simple client-server designs, they can no longer cut it as what is needed now is a system that offers dynamic flexibility.