What is USB?
USB is a shortened form of universal serial bus. It is a standard type connection used to connect external devices to computer. It is a plug and play interface which allows communication between external devices and computer. Its plug and play feature allows to discover and configure peripheral devices without turning on computer. USB allows hot swapping which permits removal of new peripheral device without rebooting the computer. These peripheral devices may include mouse, digital camera, printer, scanner, media devices, key boards, hard dive, modems and flash drives. It provides data transfer rate of 12mpbs.