USB is an interface plug & play between PC and certain devices such as keyboards, mouse, printers, modems, plates of sound, digital cameras, etc., which in the past were connected differently for example through ports serial or parallel, which require different drivers to operate and were many slower in what transfer rate refers.This interface is also widely used in data storage devices as they can be the USB memory or as a safety device so that our PC is locked and not be able to access our information such as USB keys we can name several benefits of Usb port: 1 one of the most important features is that allows devices to work at speeds on average to about 12 Mbpswhich is more or less 3 to 5 times faster than a device of parallel port and 25 to 40 times faster than a serial port device. 2 Has a more simple connection, since it has only one type of cable, by the tantopracticamente not be they registered errors when installing printer, camera, or even a storage device such as a flash drive, because there is only one type of cable (a-b USA) with different at each end connectors, so it is impossible to connect it wrongly. 3 Is cross-platform, it can be used both in different operating systems such as Windows, Linux or OS2 and different hardware as a PC or MAC platforms. This benefits significantly to compatibility, since eliminating the risks in offers a range of products, enabling the creation of innovative PC combinations, manufacturers software and peripherals that meet the needs of specific market segments. Remember that in the past, each device had a different port, the printer parallel port, serial port mouse, as well as also the keyboard used different port called ps/2. 4 Is Plug and Play, that is when we connect a printer or scanner via the USB interface, is not necessary to shut down the computer so that the new hardware is detected because the system automatically recognizes the connected device and installs the appropriate drivers, which allows it to be Hot Pluggable, it is saying that the user can connect and disconnect USB devices as often as you want without having to turn off and turn on the machine. 5 Is of great benefit for people with less experience in the world of computing, and to connect certain devices such as for example a network or a modem, plate years ago they had to if or if recourse to open the CPU to install the device, all this is much more easy and simple because now these devices are connected externally via USB.
6. USB technology allows connections in operation, so that users can easily incorporate a printer and when they need it, in USB, it is possible to connect up to 127 devices to our computer. In the photo we see a device to expand the connection for devices quantity.