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All About Software Defined Networking SDN or Software Defined Networking is a revolutionary concept that is seeking to optimize the function of a network and improve its efficiency drastically. There’s a central control layer in every SDN that is designed 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 can’t just monitor the traffic but can even dictate the underlying systems similar to 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 applicator layer is the level above controller and all data that travels 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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API or Application Programming Interface refers to the set of tools and protocols that are used in building software applications. In expressing software about various components similar to output and inputs as well as operations, APIs are what used. 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. Automation and functional separation, optimization strategies, significant cost savings can be achieved as well. Apart from that, higher reliability in networking functioning is obtained and programmable switches and interfaces meaning, scaling down or up of network operation becomes 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 time and the expense as well as manual administration associated with 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. 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.