Data Centre The data centre is the place where the servers and storage environments live. The primary use case of the data centre is for the many devices and systems to efficiently communicate within the confines of the data centre and to the outside world. Data centres are usually measured by their efficiency and speed, and those metrics closely revolve around network architecture. Question 4 4.1 Present a design of three-tier network architecture. (10 Marks) 4.2 Demonstrate your knowledge of software defined network (SDN). (5 Marks) 4.3 Analyse some of the more common ideas that surround SDN. (10 Marks)