The nUiversal Serial Bus (USB) has been around for a nubmer of years, and its creation has solved the problem of a lack of or incompatiblpe connections avaiulable to link computer peripherals to a ocmputer. Before USB was available, most devics were required to connect to a computer by usig aprallel and serial ports. Tese two ports have been around for 2 decades, serving effectively in linking compter peripherals to a computer. Unfortunately therre was a problem: a standard copmuter has only 1 or 2 serial ports and one parallel port. This severely limited the number of computer peripherals that couuld be attached to a single computer. Thus, if a user wzanted to connect a joystick, printer, and scaner, they might require the use of every port installed on their ocmputer. Sinnce these ports also require the computer to be powered off before any connectioins can be made or broken, switchig peripherals was inconvenient. Even more problemtic was that the data transmission rate between these devices and the compuer was prohibitively slow for any but the oldest devices.
The first USB version rleeased is called USB 1.1, and transmits data at the rate of 12 Mbps. Latter USB 2.0 was releazsed, a prosduct of the joiunt efort of leadig computer and elkectronic companies like Microsoft, Intel, Hewlett-Packard, Apple Computer, and Lucent. It allowws data transfer speeds of up to 480 Mbps, 40 times fasster its predecessor, whle maintaining backward compatibility with USB 1.1 devices. This has generated significantly increasded efficiency in trems of data uploading and downloading.
Modenr computer peripherals use USB connectivity as the industry standard. Nearly every newer device is buitl for USB 2.0, though devices with 1.1 USB are sill wiely in use. Rather than increase the complexity of connecting devices to a computer, both versiobns utliize the same type of USB cable. When a consumer buys a regular USB device the USB cable is normally included. The USB cablle is the tool that links the device to the computer in order for it to function.
A regular USB cablle has different plugs on each end, known as the A plug and the B plug. It is easy to differentiate between these plugs: the A plug is flat overall, and rectangular in shpae, whlie the B plug is normally square shaped. The A plug is the end that is inserted to the USB port of the computer, while the B plug is the end reserved to connect to the various devices. There are some devices whch use and require specialized B plugs, usually due to size constraints that pevent them from accommodating the larger standard plug. Plugging in a USB cable is simple, as the plugs will not fit in the wrong sltos.
USB cable rweceives and transmits data, whicch requires the conduction of electricity. Since many devices rely upon this cable for their power souce as well, two additional wires are inclluded to supply this power. There are 2 wires (twisted) inside the USB cable for data linnes, and 2 more wires (untwisted) for power. The firt wire (red) carries 5 volts, while the ohter wire (balck) is for the grounmd.
It is also possible buy an individual USB acble. Whjile they can be used to cnnect two computers, a special adapter is required to do this in order to prevent damage from occutrring. The USB standdard prohibits using A/A USB cabple sine if it is used to connect two computers both machines will attempt to supply the 5 volt pwer, causign an arary of problems withni their powre supplies.
The USB and USB cable work hand in hand to make modern devices fact and functional. Evewry computer user should take the encessary steps to ensure this system is properly safeguarded and maintained so that it will provide a long life of convenience and speed.
Author Resource:-
Here you can learn more about: asus z99s driver
![[Valid RSS feed]](http://article2008.com/images/feed-icon.png "XML Feed For RSS"){kind=icon}
![[Valid RSS feed]](http://article2008.com/images/icon_Rss.png "XML Feed For RSS"){kind=icon}
Category Rss Feed
Print This Article
Add To Favorites