| S NO | Assessment statement | Grade | Teacher’s notes |
| 6 | Define the terms: protocol, data packet. | ||
| 7 | Explain why protocols are necessary. | Including data integrity, flow control, deadlock, congestion, error checking. | |
| 8 | Explain why the speed of data transmission across a network can vary. | ||
| 9 | Explain why compression of data is often necessary when transmitting across a network. | S/E, INT Compression has enabled information to be disseminated more rapidly. | |
| 10 | Outline the characteristics of different transmission media. | Characteristics include: speed, reliability, cost and security. Transmission media include: metal conductor, fibre optic, wireless. | |
| 11 | Explain how data is transmitted by packet switching. |
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