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ANSWERS: 1
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While USB 1.0 only supports one data rate of 1.5 Mbit/s for keyboards, mice, joysticks and the like, USB 1.1 adds a full speed mode at 12 Mbit/s. The major feature of the USB 2.0 standard is the addition of a Hi-Speed rate of 480 Mbit/s. It also clarifies minor technical errata. At its highest speed USB competes directly with FireWire (except in the area of digital camcorders, where USB has technological limitations that prevent it from being viable). FireWire 400 can transfer data between devices at 100, 200, or 400 Mbit/s data rates (actually 98.304, 196.608, or 393.216 Mbit/s). Cable length is limited to 4.5 meters but up to 16 cables can be daisy-chained yielding a total length of 72 metres under the specification. FireWire 800 (Apple's name for the 9-pin "S800 bilingual" version of the IEEE1394b standard) was introduced commercially by Apple in 2003, allows an increase to 786.432 Mbit/s with backwards compatibility to the slower rates and 6-pin connectors of FireWire 400. (http://en.wikipedia.org/wiki/Universal_Serial_Bus) (http://en.wikipedia.org/wiki/IEEE1394)
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