Text Questions

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Textbook Questions
Assignment-Week 6

Question 2: How does the traditional approach to network design differ from the building-block approach?
Traditional Network Design:
The traditional network design approach follows a structured systems analysis and design process similar to that used to build application systems. * The network analyst meets with users to determine the needs and applications. * The analyst estimates data traffic on each part of the network. * The analyst designs circuits needed to support this traffic and obtain cost estimates. * Finally, a year or two later, the network is implemented.
Three forces are making the traditional design approach less appropriate for many of today’s networks: 1. The underlying technology of computers, networking devices and the circuits themselves are rapidly changing. 2. Network traffic is growing rapidly. 3. The balance of costs has changed dramatically over the last 10 years.

Building Block Approach:
The building-block approach attempts to build the network using a series of simple predefined building components, resulting in a simpler design process and a more easily managed network built with a smaller range of components. The basic process involves three steps that are performed repeatedly. Needs analysis involves developing a logical network design that includes the geographic scope of the network and a categorization of current and future network needs of the various network segments, users, and applications are either typical or high traffic. The next step, technology design, results in a set of one or more physical network designs. Network design and simulation tools can play an important role in selecting the technology that typical and high-volume users, applications, and network segments will use. The final step, cost assessment, gathers cost information…...

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