Propose a network design for ABC Company. They have HQ in Melbourne and two branch offices, one in Sydney and other in Adelaide. They have 4 internal department within the company and there are at most 200 employees in all three offices. While designing the plan, consider the present covid scenario and keep a plan to have a secure work from home too. 

You are free to choose the nature of the company and give the details in your introduction. 

The various tasks that need to be available in the report is given below. 

Task 1	Write an introduction for the project explaining the major design problem and explain and show the modular network design you may propose for the same.
Task 2	Explain the switching and routing requirements and design of the network
Task 3	Explain major security concerns and security measures proposed for the network
Task 4	Explain the wireless design requirements within the HQ and branch offices
Task 5	Propose the QoS model/strategies used for different applications like voice and real time video, HTTP and FTP, TCP etc