We provide the same protections for these electronic communications that we employ in the maintenance of information received by mail and telephone. If you choose to correspond with us through email, we may retain the content of your email messages together with your email address and our responses. We may request that you voluntarily supply us with personal information, including your email address, postal address, home or work telephone number and other personal information for such purposes as correspondence, placing an order, requesting an estimate, or participating in online surveys. Personal Information You Choose to Provide.Similarly, a percentage improvement in throughput for Floodlight over POX is 5.4, 8.9, 3.8 and 4.9% for single, linear, tree and custom topology respectively.When you visit our website you may provide us with two types of information: personal information you knowingly choose to disclose that is collected on an individual basis and website use information collected on an aggregate basis as you and others browse our website. It is obtained that, a percentage improvement in round-trip time for Floodlight over POX is 11.5, 13.9, 19.6 and 14.4% for single, linear, tree and custom topology respectively. A single, linear, tree and custom (user-defined) topologies are designed in Mininet by enabling external controllers. A performance comparison of both controllers is tested over different network topologies by analyzing network throughput and round-trip delay using an efficient network simulator called Mininet. This paper mainly focuses on two OpenFlow-enabled controllers, namely, POX-a Python-based controller and Floodlight-a Java-based controller. This paper includes a brief survey of different SDN based OpenFlow-enabled controllers available in various programmable languages. A setup and configuration task of a control plane to work as an SDN controller is explained in this paper. The SDN architecture is a form of network virtualization where the network controlling functions and forwarding functions are decoupled. Software-Defined Networking (SDN) is an emerging network architecture that is adaptable, dynamic, cost-effective, and manageable.
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