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Submitted by jbudds on August 2, 2005
Category: Technology
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The Logical and Physical Design of a Network
When a network is being designed, the architect must first think about the logical layout and that should be enforced. When he figures out what devices need to communicate and how, a physical design of the network can be implemented. A logical design is the reasoning of a network, with no particular devices or locations chosen. The physical design of the network is when the devices are picked and their actual location determined.
When the logical design of a network is planned, an engineer will generally map out the logical layout and addressing of the network. This allows the person to picture the topology of the network and the addressing scheme that will be used amongst the network devices. Information must be gathered about several important factors before the logical design of the network is started. For example, depending on the services that will be provided to users, you may need to analyze the possible traffic patterns that might result from your plan. Locate potential bottlenecks and, where possible, alleviate them by providing multiple paths to resources or by putting up servers that provide replicas of important data so that load balancing can be provided. You need to determine who the clients are and what their actual needs will be. Distinguish between novice and power users. The services that will be provided on the network should also be determined during the logical planning stage. They may be limited by a scope, such as a firewall between LANs. And if so, that still doesn't account for configuring a firewall to enable access to the Internet. You may also need to determine if an Internet connection will be needed for \internal network's users and outside vendor. Will all users need to access emailboth within the internal network and through the firewall on the Internet? The same goes for what sites users will be allowed to access using a network browser and other network...
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