| 30 | 30 | Another example is detachable Wireless card. As soon as the wireless card is plugged in to the right slot of the computer, the operating system (device driver part written for this card ) takes care of different functions require to make the card available for user communication. The driver registers the device as if it is an integral part of the computer, then it sets different parameters (power, frequency, mode of operation and so on depending upon the card as well as driver)necessary for the card to communicate properly. Once the card is live it listens from other computers / Wireless Access point and forwards the packet (data packet / broadcast packet or any other payload depending upon the communication protocol established) to the kernel. Here the device driver does this task to forward the packet to the kernel (there is a lot of processing that takes place on the card itself at a hardware level before the packet id forwarded to the device driver). |
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