الفهرس 
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Abstract
Abstract
Software Defined Networking (SDN) proposals are introduced with their particular hesitations. In addition, contests that are necessary to be addressed by researchers. A Controller, the key and the central network resource in SDN, has multifaceted associates that lead to traffic load between other forwarding devices in the entire network and in addition from and to other Controllers. A Controller’s volume of communications will be grown once the network becomes larger. Controller scalability one of the prime issues of SDN produced by this development. This dissertation grants SDN with a novel framework architecture depends on addressing and directing through multiple levels of controllers located and encompassed in two levels hierarchal sequent. As a result, an efficient resource allocation and scalability strategy are achieved. The framework is implemented and evaluated. Experimental results show their superiority by reducing the number of messages handled via the Super Intend Controller for each domain and sustained performance for the entire network. The proposed framework demonstrates three scenarios. Scenario A based on sending and receiving packets inside the domain controlled by local controller, scenario B based on sending and receiving packets from and to different domains through the border nodes as long as the domain controllers on the same level with no interference from the SC. Scenario C, the only case the SC will be interfered because the sending and receiving will be through different domains and controllers levels. We decrease the load over the SC by decreasing the number of messages to and from the SC by eliminating the chances may the SC is used (only in scenario C). The average latency time is decreased by 28.7% compared to SDN framework in literature.