February 13, 2009

Understanding USB

The Universal Serial Bus(USB) protocol is designed to make it easier for pC users to connect monitors,printers,speakers,modems and input devices like scanners,digital cameras,joysticks and multimedia game equipments.USB has two data rates,12 Mbps for devices requiring increased bandwidth and 1.5 Mbps for lower speed devices like joysticks and game pads.USB uses a tiered star topology,which means that some USB devices called USB hubs can serve as connection ports for the other USB peripherals.Only one device needs to be plugged into PC.Other devices can then be plugged into the hub.USB hubs may be embedded in such devices as monitors,printers and keyboards.

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