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\subsection{OpenFlow \subsubsection{OpenFlow  Switch} In the previous section the high level OpenFlow protocol is described. To create the level abstraction OpenFlow addresses three (3) concerns: (1) Defining how data should flow that is received by a switch (flow-table), (2) ability to control/change the flow-tables based on network conditions, and (3) a standard communication between the controlling part and the switch. These different concerns are represented in Figure \ref{fig:switch}, which was taken from the OpenFlow switch specification documentation\cite{Goransson_2014}.