As a network engineer, you have just been assigned the task of managing a new Data Centre for a client. Your senior colleague has advised the use of Software Defined Networking $($SDN$)$ as a suitable technique for network traffic engineering at this site due to its numerous advantages. Before you start managing the client$$s new Data Centre, your senior colleague wants you to do some research. You are to briefly describe the use of Software Defined Networking $($SDN$)$ as a network traffic engineering technique with the merits and possible drawbacks of this technique.