Revision

If you can answer these questions entirely correctly then you are fully prepared for the Unit assessment.

L1: What is the Internet

1. What is the Internet? (One sentence)
   
   

2. What is the difference between the Internet and the World Wide Web? (3–5 sentences)
   
   

3. What is an IP address used for? (One sentence)
   
   

4. Why do we need the Domain Name System (DNS)? (One sentence)
   
   

5. What are data packets and why are they used? (3–5 sentences)
   
   

6. Name two services that are part of the Internet but not part of the Web. (One-word each)
   
   

7. Give two protocols used for communication and explain what they do. (3–5 sentences)
   
   

L2: Connectivity and Bandwidth

1. What is bandwidth and how is it measured? (One sentence)
   
   

2. What does Mbps stand for? (One sentence)
   
   

3. Why are fibre optic cables better than copper cables? (3–5 sentences)
   
   

4. What is buffering and what causes it? (One sentence)
   
   

5. What is the difference between download speed and upload speed? (One sentence)
   
   

6. Name two things that can weaken a Wi-Fi signal. (One-word each)
   
   

7. How does internet speed affect tasks like streaming or gaming? (3–5 sentences)
   
   

L3: Network Topologies

1. What is a network topology? (One sentence)
   
   

2. Describe how data moves in a star topology. (One sentence)
   
   

3. Give one advantage and one disadvantage of a bus topology. (One sentence each)
   
   

4. What happens if the backbone cable in a bus network is damaged? (One sentence)
   
   

5. Describe how a ring topology moves data and one risk it creates. (3–5 sentences)
   
   

6. What is a hybrid topology? (One sentence)
   
   

7. Why does the choice of topology matter in network design? (3–5 sentences)
   
   

L4: Client-Server and Peer-to-Peer Networks

1. What is a client-server network? (One sentence)
   
   

2. What is a peer-to-peer network? (One sentence)
   
   

3. Give one advantage and one disadvantage of a client-server network. (One sentence each)
   
   

4. Give one advantage and one disadvantage of a peer-to-peer network. (One sentence each)
   
   

5. Why are client-server networks often used in schools? (3–5 sentences)
   
   

6. What is cloud computing and how does it relate to the client-server model? (3–5 sentences)
   
   

7. Name two examples of services that use the client-server model. (One-word each)
   
   

L5: Encryption and Security

1. What is encryption and why is it important? (3–5 sentences)
   
   

2. What is the difference between plaintext and ciphertext? (One sentence)
   
   

3. What is a key used for in encryption? (One sentence)
   
   

4. How does the Caesar Cipher work and why is it insecure today? (3–5 sentences)
   
   

5. What is the difference between symmetric and asymmetric encryption? (3–5 sentences)
   
   

6. What is a brute-force attack? (One sentence)
   
   

7. Give one example of a real-world app that uses encryption and explain how it protects your data. (3–5 sentences)
   
   

L6: Data Packets and Protocols

1. What is a data packet and what does it contain? (3–5 sentences)
   
   

2. Why is data split into packets when sent online? (One sentence)
   
   

3. What is packet switching and how does it work? (3–5 sentences)
   
   

4. What is the role of TCP in sending messages? (One sentence)
   
   

5. How do packet numbers and IP addresses help reconstruct data? (3–5 sentences)
   
   

6. Name two internet protocols and describe what they are used for. (One sentence each)
   
   

7. Why must all devices follow the same communication protocols? (3–5 sentences)