IEEE-1394, also known as FireWire or iLink, is a
versatile, high-speed, and low-cost method of interconnecting a variety
of computer peripherals and consumer electronics devices.
6-pin to 6-pin design is ideal for connecting computers and other
devices with 6-pin FireWire ports.
If you want an all in one 6-pin to 6-pin, 6-pin to 4-pin, and 4-pin to 4-pin cable, check out the Firewire 3-in-1 cable.