The amount of data which can be transmitted within a fixed time period.
bps – Bits per second
kbps – kilobits per second
mbps – Megabits per second
*USB pushes data through faster than serial*
Simplex – One way transmission
Half-duplex – Data goes both ways but only one way at a time
Full-duplex – Data can go both ways at the same time. 100mbps full-duplex means a bandwidth of 100 mbps in both directions.