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All About Software Defined Networking SDN or Software Defined Networking is actually a revolutionary concept that seeks to optimize the network’s function and improve its efficiency further. In SDN, there is basically a central control layer that is meant to regulate the flow of info as well as the associated usage of bandwidth and several other parameters. With this being said, we can say that SDN controller offers administrators the bird’s eye view of the whole network it and functions as a virtual brain. They couldn’t just monitor traffic but can also dictate the underlying systems like routers as well as other network gear, switches, how the network traffic must be handled and so forth. As a result, network engineers can respond easily to individual changing needs and to shape traffic flow without manipulating and hunting for individual switches. As a matter of fact, SDN is the central brain and functions as intermediary between two levels. Applicator layer is the level above the controller and all data that’s travelling to that level is northbound while infrastructure is the level below it which all data travelling in this direction is southbound.
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Application Programming Interface or simply API indicates the set of tools and protocols used in building software applications. APIs help in expressing software in regards to its various components similar to output and inputs as well as operations. For this reason, in SDN, the northbound APIs are communicating with all apps on top while southbound APIs are communicating with routers and eth switches below.
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The primary benefit of incorporating SDN is that, the operational expense and capital is significantly reduced. Automation and functional separation, optimization strategies, significant cost savings can be achieved as well. Aside from that, higher reliability in network functions is necessary and even programmable switches and interfaces meaning, scaling down or up of network operation is pretty basic. This is because of the reason that traffic loads can be quickly adjusted, cost effective and dynamic. With this in mind, SDN seeks to serve a bridge between physical hardware part and intelligence part without causing any compromises either on its efficiency or functionality. The associated time and expense and even manual administration with reconfiguration are reduced dramatically. At some point in time when loopholes exists in networking technology such as complexity, inability to scale down or up quickly and vendor dependence are leading cause to slow growth, software defined network appears to be the hope of all this. With the dawn of a new era that’s data driven, app intensive at every touch point and cloud centric, SDN is set to be the answer to having continuous progress.