I've been asked to put together a proposal for replacing hubs with switches at a branch office. I need 2 different solutions to the following situation:

* The company has a branch location still using an Ethernet hub network. Congestion issues are getting to be a serious problem as more and more services are being added to the network.Currently each of the four floors has one or more hubs in a wiring closet supporting 30-35 computers except the ground floor, which has 65 computers.

*The four floors plug into an 8-port switch that was added earlier to reduce the congestion problems. While that solution was a major improvement it cannot keep up all of the time anymore. The Two servers and router to the internet also connect to the 8-port switch.

*The Branch cabling is relatively new and certified to category 5 standards. The company is not interested in any major cabling changes at this time.

*At least 75% of the 160 current workstations have NICs with 10/100, full duplex capabilities. All Laptop computers have newer NICs. All new machines include similar NICs.

*Need to consider what should be done with the existing switch. Are there higher bandwidth options for connecting the two servers?

Any suggestions would be greatly appreciated. Thanks in advance....