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Network Design
The process of gathering technical requirements for a network design project may differ from one organization to another, but the requirements themselves can be described using many of the concepts discussed in the lecture this week (i.e. Scalability, Availability, Network performance, Security, Manageability, and Affordability).
Analyzing technical requirements for the customer is important in helping one best fulfill the customer's expectations. The various objectives that need to be fulfilled involve the factors of Scalability, Availability, Network performance, Security, Manageability, and Affordability.
Scalability
Scalability refers to the amount of growth that a network design can support. This is particularly important for large companies that are adding users, applications, additional sites, and external network connections all the time. The proposed network deign should be able to adapt to any envisioned additions. You will want to know the prospective amount of networks, users, servers, and/or sites that may be added to the network within the coming few years.
Availability
Availability refers to the amount of time that the network...
In mathematical terms, availability can be expressed as the percent uptime per year, month, week, day, or hour, compared to the total time in that period. For instance, a network that offers 24-hour, seven-days-a-week service, and is only up 165 hours in the 168-hour week, has availability that is 98.21% (*).
In technical terms, 'availability' is connected with 'resilience' referring to the amount of stress a network can handle and the rapidity that it bounces back from stress. Good availability equals good resilience.
Related to the concept of availability is disaster recovery. Any design of computer networks must take this aspect into consideration. Plans must be made as to how to save computer data from outages and from natural or man-made disasters.
Customer should specify availability requirements so that expectations are met.
Network performance
You should discuss expectations of network performance with client before designing network. Performance includes details of throughput, accuracy, efficiency, delay, and response time.
The following list should…
Prioritizing the goals is helpful for both you and client, so you start off with the most important goal ending with that least important to client. A list of options, too, can be made and correlated with goals. In this way, you will be more likely to design a computer network that will meet client's expectations.
Source
Oppenheimer, P. (1999) Top-down network Design (3rd Ed.) Cisco Press.
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