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S6 ICT: Data Communications and Networking (Paper 1 (basics))
S6 ICT: Data Communications and Networking (Paper 1 (basics))
Paper 1 (basics): ten questions on data communications and networking with worked numbers, answers and one line notes.
01 Paper details (check answers afterwards)
| Item | Detail |
|---|---|
| Questions | 10 |
| Suggested time | 20 |
| Difficulty mix | Foundation 3 · Intermediate 3 · Challenge 3 · Error redo 1 |
| Chapter | Chapter: S6 ICT: Data Communications and Networking |
| Level | S6 |
02 Questions (10 items)
- FoundationWhich covers a larger area, a LAN or a WAN?
- FoundationWhich device joins different networks and chooses a path for the data?
- FoundationIs the address 192.168.1.10 IPv4 or IPv6?
- IntermediateWhat address does a switch mainly use to forward frames?
- IntermediateWhy does packet switching use bandwidth better than circuit switching?
- IntermediateWhat is the main job of a firewall?
- ChallengeA 2.4 MB file is sent at 8 Mbps. How many seconds does it take?
- ChallengeA bandwidth of 100 Mbps moves how many megabytes per second?
- ChallengeHow many usable host addresses does the subnet mask 255.255.255.0 (/24) provide?
- Error redoError clinic: a computer that can go online does not need an IP address. What is wrong?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | A WAN covers a larger area | A WAN can span cities, countries or the world, while a LAN is usually limited to one office or campus. |
| 2 | A router | A router uses IP addresses to pick the next hop and sends packets towards the destination network. |
| 3 | IPv4 | It has four dot separated numbers, whereas IPv6 uses eight hexadecimal groups. |
| 4 | The MAC address | A switch learns which MAC address sits on each port and sends the frame only to the correct port. |
| 5 | Many conversations share the same link in turn | Packets queue and travel as needed, so an idle link can serve other traffic. |
| 6 | It filters traffic entering and leaving the network by rules | A firewall checks source, destination and port and blocks unauthorised connections. |
| 7 | 2.4 seconds | 2.4 multiplied by 8 gives 19.2 megabits, which divided by 8 gives 2.4 seconds. |
| 8 | 12.5 MB | 100 divided by 8 gives 12.5. |
| 9 | 254 addresses | There are eight host bits, and two to the power eight minus two gives 254. |
| 10 | Going online is exactly why an IP address is needed, to identify source and destination | Without an IP address packets cannot reach your computer, and replies cannot come back. |
04 What to do after marking
- After marking, redo only the wrong items and write down which step went wrong (formula, unit, or misread number).
- Repeat the same item two days later; move to the next paper only when both attempts are correct.
- Parents only need the answer and note columns; there is no need to explain every item.
Decide first whether a network question is conceptual or numerical. For concepts, separate the device layers: hub, switch and router. For calculations, multiply megabytes by eight to get megabits, then divide by the bandwidth to get seconds. For subnet masks, usable hosts equal two to the power of the host bits, minus two.Tutor Registration →
Questions and answers are written originally by the TutorZone team and are not taken from any school, publisher or examination authority paper. Every value is checked by computer.
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