In order to design or upgrade a computer network for business, we need to consider the goals for the network design and the possible problems that will exist in the network after the design is finished or the problems that already exists in the system. Network designer needs to cooperate with the client completely and find out their business and technical goals. For instance, the network designer should be aware of the new applications that client wants to place in the business environment. The designer needs to discover the amount of network availability which is needed to help the key sections of the business to be able to function correctly.
Most of the times, the network design is accomplished by identifying the structure of the business. For instance, the logical design of a network is based on the different departments which exist in the network. So, it is a good start to discover the structure of the departments in the company as it is accomplished in the current assignment:
"The business occupies a two-storey building and a small single storey supplementary building.The larger building has a business broadband connection using ADSL over ATM (PPPoA). The broadband connection has an 8Mbps download and 1 Mbps upload. ...
On the ground floor there are two training rooms - one containing 14 computers, the other containing 12 computers. The administration department is located at the centre of the ground floor and contains 10 computers plus a file/printer server.
On the first floor there is a multimedia centre, which contains 16 computers, and a design/development department, which has 24 computers. The supplementary building houses the test department and contains 18 computers. This building is 500m away from the main building. It is company policy, wherever possible, to buy Cisco Networking Products."
This information helps us to discover all main user communities and to make adequate network traffic flow.
Common business goals of designing a LAN for businesses is to increase the revenue, increasing the performance of the employees, reducing networking costs, increase in the security and a better service for customer support.
Step 2: Identifying Technical Goals/Needs
After discovering the business goals, we need to identify the technical goals in current business too. The technical goals are often based on the business goals and sometimes, it is hard to discover the technical needs.
The most important technical goal in order to design an enterprise LAN (or in a larger scale which could be WAN) in this assignment is scalability. There are other important factors too. For example availability of the network is another important issue to be considered.
Scalability is considered to be the quality of a network to keep its functionality and performance considering the changes in network size or volume. The businesses today are rapidly growing and the number of users in a