tailieunhanh - Networking: A Beginner’s Guide Fifth Edition- P47

Networking: A Beginner’s Guide Fifth Edition- P47:I have run into many people over the years who have gained good even impressive working knowledge of PCs, operating systems, applications, and common problems and solutions. Many of these people are wizards with desktop computers. | 212 Networking A Beginner s Guide When assessing needs you are trying to come up with detailed answers to the following questions How much storage space is required How much bandwidth is required What network services are required What is the budget for the project These basic questions are fairly easy to answer as a whole but you need to break them down further to make sure no holes in the network design could lead to problems. For example it might be easy to determine that the network must be able to support up to 100 Mbps of bandwidth but you need to know how when and where that bandwidth is used. If the accounting department is using 90 percent of the bandwidth when communicating to the accounting server for example then naturally you want to put the accounting system s server and its users on their own network segment. You won t recognize such issues and how to address them unless your assessment leads you to determine with some degree of detail how the network resources will be used. The following sections discuss what you should examine as you learn what a given network must be able to do. No particular order exists in which you should examine these issues and you might find that you need to cycle through the list several times to get a complete picture. You also might find a particular company s needs require more or less analysis in each category. Common sense is required when you design a network. The following suggestions are guidelines to start you on the right path. Applications A good place to start with a network design is to list and understand the applications that will run on the network. Ultimately a network is only as good as the work it helps people accomplish and people do their work most directly through the application software they use. If the applications don t work right then the users won t work right. Most networks have both common applications and department- and user-specific applications. Most companies usually meet the common .

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