| S NO |
Assessment statement |
Grade |
Teacher’s notes |
| 6 |
Define the terms: protocol, data packet. |
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| 7 |
Explain why protocols are necessary. |
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Including data integrity, flow control, deadlock, congestion, error checking. |
| 8 |
Explain why the speed of data transmission across a network can vary. |
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| 9 |
Explain why compression of data is often necessary when transmitting across a network. |
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S/E, INT Compression has enabled information to be disseminated more rapidly. |
| 10 |
Outline the characteristics of different transmission media. |
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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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