Q4. (a) In data communication systems, information is transferred between the source and destination devices using two modes. Use suitable diagrams to compare between serial and parallel data communication systems. [8 marks] (ii) State THREE examples of each type of data communication system. [6 marks] (b) Figure Q4 shows the sequence diagram for a serial communication system. Write down the data value transmitted in binary and give the hexadecimal equivalent. [4 marks] (i) H Idle Start bit LSB 0 10 0 1 1 0 Data bit period logic 0 or logic 1 (bytes transmitted least significant bit first) MSB 0 Two stop bits H Idle Q4 continued (c) Explain the following terms associated with serial communication systems. Give ONE example and include a suitable diagram for each communication mode. (i) Simplex (ii) Half duplex (iii) Full duplex [4 marks] [4 marks] [4 marks] [Total 30 marks]