For a network to meet the needs of a business, it must be designed around the objectives and structure of the organization. For a long-term investment, the network must be able to be resized as required and be based on technologies that will remain both robust and scalable. A system infrastructure is the express road on which hardware and software rides and is therefore a major business investment, one that will affect the efficiency and profitability of the business. Creating a network design that is closely matched to the needs of the organization ensures that the most appropriate technologies are incorporated and the system design adopted respond flexibly to business changes.