 The core purpose of a switch is to decongest network flow to the workstations so that the connections can transmit more effectively; receiving transmissions that were only specific to their network address.With the network decongested and transmitting data in both directions simultaneously this can in fact double network speed and capacity when two workstations are trading information.For example, if your network speed is 5 Mbit/s, then each workstation is able to simultaneously transfer data at 5 Mbit/s.