Your drivers are placed on top of the other. When your computers working system needs to communicate with the new hardware, then it gives the information to the pile of drivers and each one of this drivers will confirm to view if the data is appropriate. A driver scanner will examine if the particular data packet is certainly for that certain scanner and if it were for that scanner, then the driver will draw jointly the packet and connect to it. If it is not for the scanner, it will then go on to the next driver on the pile and perform the process all over again.