1.

Decide whether each of these statements is True (T) or False (F).

A serial communication interface:

1. Involves data being transmitted and received one bit at a time.

2. Is a faster form of transmission than parallel communication.

1. (i) T (ii) T

2. (i) T (ii) F

3. (i) F (ii) T

4. (i) F (ii) F

2.

Decide whether each of these statements is True (T) or False (F).

The RS232 communications interface:

1. Is a serial interface.

2. Is typically used for distances up to about 15m.

1. (i) T (ii) T

2. (i) T (ii) F

3. (i) F (ii) T

4. (i) F (ii) F

Problems 3 and 4 refer to the following which shows the bits on an RS232 data line being used to transmit the data 1100001:

3.

Decide whether each of these statements is True (T) or False (F).

The extra bits X and Z at the beginning and the end are:

1. To check whether the message is corrupted during transmission.

2. To indicate where the data starts and stops.

1. (i) T (ii) T

2. (i) T (ii) F

3. (i) F (ii) T

4. (i) F (ii) F

4.

Decide whether each of these statements is True (T) or False (F).

Bit Y is:

1. The parity bit showing odd parity.