what is USB?
USB (Universal Serial Bus) is a uniform connector designed to simplify the method of connecting peripherals, such as printers or keyboards, to a laptop. USB allows you to plug or unplug a device, without shutting down and restarting your laptop.
USB was designed to standardize the connection of personal computer peripherals (like keyboards, pointing devices, digital cameras, printers, portable media players, disk drives and network adapters) to private computers, both to communicate and to supply electric energy. It has turn out to be commonplace on other devices, such as smartphones, PDAs and video game consoles.USB has effectively replaced a selection of earlier interfaces, such as serial and parallel ports, as effectively as separate power chargers for portable devices.
With a USB drive, information can be retained for lengthy periods when the device is unplugged from the computer, or when the pc is powered-down with the drive left in. This makes the USB drive convenient for transferring information among a desktop computer and a notebook pc, or for individual backup requirements.
USB 2. 0(also recognized as Hi-Speed USB) can reach data transfer speeds of up to 480 Mbps. USB 1.1 could only attain data transfer speeds of up to 12 Mbps.
USB 3. 0is the subsequent major revision to the Universal Serial Bus (USB). It delivers the very same ease-of-use and plug and play capabilities as prior generations of USB technologies but with a 10X performance increase and far better power management. For users of USB 3.0, the objective of connecting devices to PCs or notebooks is nevertheless the exact same as the USB 2.0 specification.