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Firewire is actually the IEEE-1344 standard interface for high speed, real time data transfer. There are two versions, the 1394a and 1394b which transfer data at 400 and 800 Mbps. From this lesson you'll also learn which Firewire type uses the 6-pin connection vs. the 9-pin, and the pin count ratio for data transfer vs. power transfer. We'll look at several devices to see and explain the differences between port and connectivity relationships, you'll learn that the maximum number of devices that can be connected to a single port is 16, and why.