USB and FireWire Standards for the A+ Certification Exams

Part of the A+ Certification All-In-One For Dummies Cheat Sheet

The most popular ports used today on the system are the USB and FireWire ports — which allow you to connect devices such as flash drives, digital cameras, and digital video cameras. This table compares features of USB and FireWire, including the transfer rate and number of devices supported.

Standard	Transfer Rate	Device Support
USB 1.0	12 Mbps	127 devices
USB 2.0	480 Mbps	127 devices
IEEE 1394	400 Mbps; also known as FireWire	63 devices
IEEE 1394b	800 Mbps; also known as FireWire 800	63 devices