Part C: Case Study Design WAN Infrastructure John is a System Administrator in Aus Tech. Pty Ltd. The company in this case study has offices in Sydney, Melbourne and Brisbane. Each of these offices has three own Local Area Networks (LANS). The company wants to connect their three offices in a WAN so that they can communicate with each other. John was advised by his manager to prepare blueprints of requirements which show how these offices can be connected with each other. What are the options they have and what is the best option? John decides to make a team that compiles a list of equipment and apparatus which is needed for this project. You are a member of John's team and he has asked you to prepare a document to implement WAN for a specific workplace or simulated workplace. Each document is required to demonstrate technical and cost-effective plans and procedures. Task: Describe the most appropriate technologies and protocols that should be used for the WAN. Decide the Internet Service provider (ISP) according to the bandwidth requirements of the company. You may extend the information provided in the published scenarios in order to justify your solution. Area to explore: Switched circuits, leased lines, T-carrier, Synchronous optical network (SONET), high-speed digital subscriber line (HDSL).