Parallel+Data+Transmission

Parallel data transmission is when the cable contains multiple wires, some of which let the two pieces of hardware communicate between each other, with the rest carrying data from one piece of hardware to the other.

Because of the multiple wires each of the bits being sent must be simultaneous, this can prove difficult over a long distance as the signals become disjointed, this problem is called skew.

As multiple bits can be sent at once, higher data transfer rates than can be achieved than serial transmission.