- USB technology serves several connectivity functions. Computer users can connect devices directly to their computer using "Plug-and-Play" technology. This eliminates the need for installing additional hardware such as PCI cards or installing drivers before using devices. Another USB function is to power devices that require less power, such as small digital cameras. Another main function of USB technology is file transference, as seen through the rising popularity of jump drives and other external storage devices. Finally, USB technology allows for "hotswapping," the process of unplugging hardware without having to restart or shut down the computer.
- USB comes in two speeds: USB 1.1 and USB 2.0. Most electronics today use USB 2.0, enabling devices to be connected at speeds of 480Mbps. Computers built in 2000 or earlier are equipped with USB 1.1, which connects devices at a considerably slower speed of 12Mbps. USB 3.0, an even newer USB technology, enables devices to be connected at speeds 10 times faster than USB 2.0, and with greater efficiency.
-
To use USB technology, you must have the correct USB cable. Most USB cables are USB 2.0 but are backwards-compatible, allowing them to utilize USB 1.1 ports. Every USB cable features a "connector" at both ends. Staying true to the "universal" part of the USB acronym, most USB cables feature a "type A" connector on one end, which plugs into a USB port on a computer. The
connector that is plugged directly into the device varies in type. For example, printers often require a cable featuring a square-shaped "type B" connector, while smaller devices like mobile phones use a "mini type B" connector. - The benefits of USB technology include faster file transfer speeds, user-friendly installation of peripherals and other hardware, and increased mobility. USB technology has also enabled computer users to connect a wide variety of electronics to computers, from iPods to sewing machines.
- Devices advertised as "USB 2.0 capable" may not necessarily operate at USB 2.0 speeds on your computer. Whether your device performs at USB 1.1 speed or USB 2.0 speed on your computer depends on the computer's USB port. Although computers with USB 1.1 ports will still connect your USB 2.0 device, the device will not operate at the higher USB 2.0 speed. Most computers built after 2001 are equipped with USB 2.0 ports. You can update older computers to USB 2.0 by purchasing and installing a USB 2.0 PCI card.
