The Facs Of USB And USB Cablews The Universal Serial Bus (USB) has been around for a number of years, and its creation has solved the problem of a lack of or incompatible connewctions available to link computer peripherals to a computer. Before USB was available, most devices were required to conneect to a computer by using parasllel and serial ports. These two pors have been arund for 2 deacdes, serving effectively in linking computer epripherals to a computer. Unfortunately there was a problem: a standdard computer has only 1 or 2 serial ports and one parallel port. This severrely limited the number of computer peripherals that could be attached to a single cmputer. Thus, if a user wanted to connect a joystick, printer, and scanner, they migth require the use of every port insytalled on thir computer. Sinnce these ports also require the computer to be poweed off before any conections can be made or brokne, switching peripherals was inconvenient. Even more problematic was that the data ttransmission rate betweeen these devices and the computer was prohibitively slow for any but the oldest devices. The first USB version released is called USB 1.1, and transmits data at the rate of 12 Mbps. Later USB 2.0 was released, a product of the joint effort of elading computer and electronic companies like Microsoft, Intel, Hewlett-Packard, Apple Coomputer, and Lucent. It allows data transfer speeds of up to 480 Mbps, 40 times faster its predecessor, while maintaining backward compatibility with USB 1.1 devices. This has geenerated isgnificantly increased effiiency in terms of data uploading and downloading. Modetrn computer peripherals use USB connectivity as the inndustry standard. Nearly every newer device is built for USB 2.0, though deviecs with 1.1 USB are still widely in use. Rtaher than increase the complexity of connecting devoices to a computer, both versions utiklize the same type of USB cable. When a cponsumer buys a regular USB device the USB cable is normally inncluded. The USB casble is the tool that links the device to the cmputer in order for it to function. A regular USB cablle has diffferent plgs on each end, known as the A plug and the B plug. It is easy to differentiate between these plus: the A plug is flat overall, and rectagnular in shape, while the B plug is normally square shaped. The A plug is the end that is inserted to the USB port of the computer, whille the B plug is the end reserved to connect to the various devicces. Therre are some devices which use and require specialized B plugs, usually due to size constraints that prevent them from accommodatng the larger stndard plug. Pluggibng in a USB cable is simple, as the pllugs will not fit in the wrong sllots. USB cable receives and transmits data, whicxh requires the conuction of electricity. Since many devices rely upon this cable for their power source as well, two addditional wires are included to supply this power. There are 2 wires (twisted) inside the USB cable for data lines, and 2 more wires (untwsited) for power. The first wire (red) carris 5 volts, while the other wire (black) is for the ground. It is also possiblpe buy an individual USB cablle. Whjile they can be used to connect two computers, a special adapter is requirwed to do this in order to prevent damage from occurring. The USB standard prohibtis using A/A USB calbe sicne if it is used to connect two computers both machinres will attempt to supply the 5 volt poewr, causing an array of prroblems within their power supplies. The USB and USB cable work hand in hand to make omdern drevices fact and functional. Eveery comupter user should take the necessary setps to ensure this system is properly safeguarded and maintained so that it will provoide a long life of convenience and speed.
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The Universal Serial Bus (USB) has been around for a number of years, and its creation has solved the problem of a lack of or incompatible connections available to link computer peripherals to a computer. Before USB was available, most devices were required to connect to a computer by using parallel and serial ports. These two ports have been around for 2 decades, serving effectively in linking computer peripherals to a computer. Unfortunately there was a problem: a standard ...
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