3.14 Conclusion


3.14 Conclusion

The process of requirements analysis provides you with the means for analyzing your network, system, and the environment in which it is contained. You learned about gathering and managing user, application, device, and network requirements. This includes determining the initial conditions for the project and setting and managing your customer's expectations about the network. Initial conditions vary, depending on the network, system, and environment, as well as whether the network is new or an upgrade of an existing network. Armed with the initial conditions, you can gather requirements from the users, administration, and management and map application requirements to determine their dependencies.

You learned about determining which variables to measure (service metrics) and how to make measurements. Your choices of service metrics will lead to defining variables for network monitoring and management. We discussed modeling and simulation and how they and other approximation techniques can be used to describe user and application behavior.

Building on the service metrics, you learned about developing performance requirements for capacity, delay, and RMA, including developing performance thresholds and limits. These are useful in distinguishing between low and high performance for your network. You also learned about general and environment-specific thresholds and limits and how to determine them. Some general thresholds are presented for your use. We also discussed predictable and guaranteed performance requirements and their importance. Finally, we discussed mapping requirements to geographic locations in preparation for traffic flow analysis.

In Chapter 4, all of these concepts come together to develop a requirements specification for the network.




Network Analysis, Architecture and Design
Network Analysis, Architecture and Design, Second Edition (The Morgan Kaufmann Series in Networking)
ISBN: 1558608877
EAN: 2147483647
Year: 2003
Pages: 161

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