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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. For this, SDN controller serve as a virtual brain of a network and offering administrators the bird’s eye view of the entire network it covers. 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. SDN controller is basically the central brain and functions as intermediary between two levels. The infrastructure is the level below which all data travelling in this direction is southbound while the applicator layer is the level above the controller and all data travelling to this level is northbound.
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API or Application Programming Interface refers to the set of tools and protocols that are used in building software applications. APIs are used to help express software when it comes to 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 operational expense and capital is significantly reduced is the primary benefit of integrating SDN. As a matter of fact, you can also attain automation and functional separation, optimization strategies, significant cost savings. 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 due to the reason that the traffic loads are quickly adjusted, cost effective and dynamic. Because of that, SDN seeks to be a real bridge between physical hardware part and intelligence part without any compromises on efficiency or functionality. The time and expense as well as manual administration that’s associated with the reconfiguration are reduced dramatically. At some point in time in which loopholes still exist in networking technology like complexity, inability to scale down or up quickly and vendor dependence are the leading cause to the slow growth, software defined network appears to be the hope of all this. SDN is designed to be the answer to continuous progress with the dawn of a new era that is data driven, app intensive at every touch point and cloud centric.