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To simulate the working of SDN and OpenFlow a good local simulator called Mininet \cite{mininet} will be used. Mininet creates a virtual network, running real kernel, switch and application code, on a single machine. It allows for simulation of the different configurations.  Simulate different computing bandwidths of the servers  For that, you can add one more parameter to control how many times the server needs to do the matrix multiplication. For example, if you’d like server 1 to be two times faster than server 2, you can ask server 1 to do the multiplication 100 times, and server 2 to do it 200 times.