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Logical and physical network designs

I am a student in an IT program with no prior experience of networking. I am having a hard time answering the question of what is the difference between a logical design of a network and a physical design of a network. Is the logical design the design of the network based on current needs, growth issues and cost and the physical design of a network the actual network with cables routers switches, etc.?
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Logical Design would be the IP structure of your network. Will you be using a Class A, B or C address scheme? Will you be...  subnetting your environment? You will need to figure out how many computers you need and what locations they will be in. Then you can design your IP structure based upon the needs of your design. If it is a simple design such as 10 users you can keep it simple.

The Physical design will be the topology you will be using. Will you be using Ethernet, fiber, ISDN, etc. Will you we using a star or linear design? This deals with the physical cabling, switches, routers, etc that you will need for implementing your logical design.

This was first published in August 2002

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