FireWire is the brand name that Apple uses for the IEEE 1394 interface.It is also known by the brand names of i.LINK (Sony), and Lynx (Texas Instruments).
The USB standard has versions 1.0, 2.0 and 3.0 with different devices using different versions. Apples development began in the late 1980s, later presented to the IEEE, and was completed in 1995. On June 12, 2008, all amendments to the standard were incorporated into a superseding standard IEEE Std. Usb 3.0 Vs 4.0 Software Configuration OfIt was intended to replace the multitude of connectors at the back of PCs, as well as to simplify software configuration of communication devices. USB was created by a core group of companies that consisted of Compaq, Digital, IBM, Intel, Northern Telecom, and Microsoft. Hewlett-Packard, Intel, Alcatel-Lucent, Microsoft, NEC, and Philips jointly led the initiative to develop a higher data transfer rate than the 1.0 specification (480 Mbits vs 12 Mbits). The USB 3.0 specification was released on November 12, 2008 by the USB 3.0 Promoter Group. This is due to USBs reliance on the host-processor to manage low-level USB protocol, whereas FireWire delegates the same tasks to the interface hardware (requiring less or no CPU usage). For example, the FireWire host interface supports memory-mapped devices, which allows high-level protocols to run without loading the host CPU with interrupts and buffer-copy operations. USB was designed for simplicity and low cost, while FireWire was designed for high performance, particularly in time-sensitive applications such as audio and video. Usb 3.0 Vs 4.0 Serial Bus WhichUSB was originally seen as a complement to FireWire (IEEE 1394), which was designed as a high-speed serial bus which could efficiently interconnect peripherals such as hard disks, audio interfaces, and video equipment. USB originally operated at a far lower data rate and used much simpler hardware, and was suitable for small peripherals such as keyboards and mice. Peripherals cannot communicate with the host unless the host specifically requests communication. USB 3.0 is planned to allow for device-initiated communications towards the host (see USB 3.0 below). A FireWire device can communicate with any other node at any time, subject to network conditions. In a FireWire network, any capable node can control the network. The maximum length of a standard USB cable (for USB 2.0 or earlier) is 5.0 metres (16.4 ft). The primary reason for this limit is the maximum allowed round-trip delay of about 1,500 ns.
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