I am designing and evaluating a network for a medium sized company. i am only a beginner, any suggestions? there are 4 floors, several rooms on each floor. each room has about 15 machines, pentium 3 450, 17 inch monitors, 9gb hard drive, cdrom, 16mb sound card, 128 mb main memory. i need the network to run at a 100mb/s transfer time. i need to quote some kind of cost for the hardware. i need to suggest a topology and quote the network components used. what operating system do you suggest and why?