Three descriptions of data transmission are given below. Tick (✔) the appropriate box in each table to show the: • type of transmission • method of transmission Description 1: Data is transmitted several bits at a time down several wires in both directions simultaneously. Type Tick (✔) simplex half-duplex full-duplex Method Tick (✔) serial parallel Description 2: Data is transmitted in one direction only, one bit at a time, down a single wire. Type Tick (✔) simplex half-duplex full-duplex Method Tick (✔) serial parallel Description 3: Data is transmitted one bit at a time down a single wire; the data is transmitted in both directions but not at the same time.

1. (a)Three descriptions of data transmission are given below. Tick (✔) the appropriate box in each table to show the: • type of transmission • method of transmission Description 1: Data is transmitted several bits at a time down several wires in both directions simultaneously. Type Tick (✔) simplex half-duplex full-duplex Method Tick (✔) serial parallel Description 2: Data is transmitted in one direction only, one bit at a time, down a single wire. Type Tick (✔) simplex half-duplex full-duplex Method Tick (✔) serial parallel Description 3: Data is transmitted one bit at a time down a single wire; the data is transmitted in both directions but not at the same time.[6]
2. (b)Give two reasons why serial transmission, rather than parallel transmission, is used to connect devices to a computer.[2]