This project provides a comprehensive analysis of Xero's IT infrastructure, focusing on the Sydney branch. It begins with an overview of the geographical scope of the network, supported by a diagram, and then delves into the logical design diagram based on a three-layer hierarchical model. The project details the IP address and subnet mask configurations suitable for the Sydney branch, covering both clients and servers. It also explores potential cloud service providers for hosting emails and web servers, discussing the benefits of virtualization in supporting and implementing cloud platforms. Furthermore, the project examines how cloud computing can facilitate dynamic scaling of Xero's applications. The analysis includes network diagrams, IP address configurations, and discussions on cloud service providers like AWS and Azure, making it a valuable resource for understanding IT infrastructure in a cloud-based environment.