Network design advice needed

We need advice in the design of our network. With the design of the network we have two main objectives: - Optimize the internet connection - Have the best internal speed between each PC and the servers. General Questions: -For best network communication with the servers, should the PCs be connected through the same switch to each server, or could they be connected through the firewall/router to the servers? - What would be the recommendation for connecting 54 PCs and 6 servers to to each other allowing internet access to everybody? (servers provide services of SQL server, exchange email and sharepoint) - In terms of speed are there any difference between managed and unmanaged switches? Please check attached document with our network diagram. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Windows 2003 and Windows XP