Design a Network for a Medium Size Business

You are in charge in designing the network for a medium size business.  The business is located in a single building with three floors.  The first floor has 250 PCs, the second floor has 120 PCs, and the third floor has 120 PCs.  In addition each floor will need to support the same number of VOIP phones as the number of PCs on the floor, along with at least 50 printers.  The VOIP phones and printers do not need to access the Internet.  Your business has been allocated [login to view URL] IP address space by the ISP.  The ISP the business uses has allocated in IP address to your external router for connecting to them to the ISP.  That IP address is [login to view URL]  You may also use RFC 1918 address space as needed.  Your design needs to use generic network equipment.  Assume the router(s) have the number of interfaces you need.  Also assume the switches only support one network per switch and have 48 ports on each switch.  You will need to diagram out the network with the network information, structure of the network, IP address information, and connectivity to the ISP.  Assume Ethernet for the link types with the business purchasing 100Mbs of Ethernet to the ISP. You will make the rest of the decisions concerning the number of Ethernet links and their bandwidth. The business out-sources its servers and wireless, so you do not need to include them.  The network diagrams are to be done in PowerPoint using the network icons provided.  The PowerPoint needs to be easily viewed and not cluttered. I do not need an icon for every PC, phone, etc. So you will need to find a way to convey the information compactly. The write up on the project explaining the diagram and how the overall structure supports the requirements of the project will be done in Word.  As a measure of efficiency, assign $1 for each public IP address assigned, $1 per megabit of bandwidth for each router link and $5,000 for each switch. There is no assigned budget, but it is used as a way to determine the efficiency of your design compromises. You need to write up your design decisions, what network technologies and services that you are using and your reasons for using them.