Universal Serial Bus USB Instant connection of external devices No adapter cards needed Mouse, joysticks, thumbnail drives PC standard Megabits

USB 2 40 x faster USB 1.1 – 480 Mbps Ideal for – External hard drives – CD-RWs – DVD-r Card adapters

Firewire 400 / megabits /sec Firewire/1394 Ideal for – Digitial video – High speed storage devices – Scanners – CD-RW drives

How Does FireWire Work IEEE-1394 Very complex serial bus protocol Standard cables and connectors – I/O connectors gone FireWire cabling is similar to that of 10BaseT Ethernet Uses a “fairness arbitration approach” – Ensure all information is transmitted using the bus – Layered transport system

How Does FireWire Work Three layers – Physical, Link, Transaction – Physical Provides the signals required by the bus – Link Takes the raw data from the physical layer Formats it into recognizable 1394 packets – Transaction Takes the packets presents them into the application Remainder of the transaction functions are performed in software

FireWire Supports up to 63 devices on a single bus Instandlt connect devices w/o turning off other machines Ability to stream A/V data in realtime Originally developed by Apple Gone from Mbps Products come with FireWire connections

USB 2 Vs FireWire USB 2 is faster then FireWire 400 – USB card or Motherboard – If not than it runs at 1.1 – Backward compatible w 1.1 – Thumb drives 2,0 – Cables USB 2 is faster then FireWire 800 – 800 faster – Most cameras are FireWire connection 4 pin