Wired communications
Serial
- Single wire
- Transmit one bit at a time
- May include extra wires for clock or handshaking
- Examples: RS-232, Ethernet, USB, Firewire, IrDA
Parallel
- Multiple wires
- Transmit a word at a time
- May include extra wires for clock or handshaking
- Examples: SCSI, PCI bus (PC), NuBus (Mac), PCMCIA