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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’s a central control layer seeking to regulate the flow of info as well as the associated usage of bandwidth and several other parameters. In relation to this, SDN controller serves 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. Because of this, it becomes easier for network engineers to respond to changing business needs and shape traffic flow without having to manipulate and hunt 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. 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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Among the many benefits of implementing SDN is the fact that it significantly reduce operational expense and capital. 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 due to the reason that the traffic loads are quickly adjusted, cost effective and dynamic. Thus, SDN is seeking to be a real bridge between the physical hardware part and intelligence part without compromises on efficiency or functionality. The time and the expense as well as manual administration associated 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.