Universal serial bus (USB) A high-speed serial bus that supports
127 devices in the chain. USB uses a standard connector type that is used by
most devices, including mice, printers, network cards, digital cameras, and
flash drives. There are two USB standards: USB 1.1, which has a transfer
rate of 12 Mbps, and USB 2.0, which has a transfer rate of 480 Mbps. There
are two standard USB connectors, Type A and Type B. Type A connectors
connect to the computer, whereas Type B connectors connect to the device.
Figure 1-28 displays these two connector styles.