I have a network of approximately 20 users. I have an SBS 2003 Standard Server which is used as a DC, Exchange and File Server. Recently some of the users on the network but not all are experiencing very very slow network data transfer speeds. The workstation hardware is not standard in other words i cannot determine if it is specific to one type of hardware or not because almost every workstation is different. I tried plugging my laptop into one of the network jacks where the throughput was good and tested by copying a large file from the server to my laptop and seeing approximately how long it takes. Then I took my laptop and connected it to a port where the transfer speeds are very slow but when I used my laptop everything worked well. I have a Dell PowerConnect 2724 in unmanaged mode. I am fairly confident that the switch is operating correctly and that there are no problems with the physical cabling. One other important note is I just update the SBS server to the recently released SP2 for Windows 2003. Any suggestions? When I talk about slow speeds it will take about 45min to transfer 20mb from the server to a workstation.