1. A method of testing at least one software component under test executing on a first computer, the software component under test adapted for use in sending a transmission over a network between the first computer and at least a second computer, the method of testing comprising acts of: a) emulating on the first computer a first driver adapted to control hardware interfaced to the network; and b) emulating on the first computer a second driver adapted to control hardware interfaced to the network; wherein emulating the first driver and emulating the second driver comprises emulating the transmission over the network from the first computer to the second computer.