11About USBAbout USBUSB stands for Universal Serial Bus. It is the interface betweenyour computer and the USB devices you plug into it. Yourcomputer communicates with USB devices through the USBinterface.Some USB features are particularly important to desktop computerusers:■ USB is one-size-fits-all—any USB device can be plugged intoany USB port using the appropriate USB cable.■ USB devices feature plug-and-play installation—you don't haveto open your computer or add special hardware to install a newUSB device. Once you plug your USB device into yourcomputer (or hub) and turn it on, you can start using it rightaway.■ You can hot-swap USB devices. You can easily unplug yourdigital camera to take away with you, or plug in your joystickduring your lunch break.■ You can have many USB devices connected to your computer atonce. Most newer computers come with 2 USB ports. USB hubscan provide additional ports.USB 1.1 vs USB 2.0USB 2.0 transfers data at 480 Megabits per second. USB 1.1transfers data at 12 Megabits per second—that makes USB 2.0 up to40 times faster than USB 1.1.USB 1.1 devices cannot operate at USB 2.0 speeds even whenconnected to a USB 2.0 hub or adapter.