Work through the list without notes. If you cannot do a statement, follow its link, then come back. Guide = study guide; Practice = practice questions.
Understanding
- I can define computing device, computing system, computer network, path, routing and bandwidth. (Guide: “From one device to a network”; Practice Q1)
- I can explain how the Internet works as interconnected networks with open protocols. (Guide: “What makes the Internet the Internet”; Practice Q5, question 10)
- I can explain what a packet contains and why packets may arrive out of order or not at all. (Guide: “Packets”; Practice Q4, Q9)
- I can explain the difference between the Internet and the World Wide Web. (Guide: “The Internet is not the Web”; Practice Q2, question 10)
Skills
- I can list the paths between two devices in a network diagram. (Guide: Worked example 1 part (a); Practice Q6, Q8)
- I can calculate transfer time from file size and bandwidth, converting bytes to bits. (Guide: Worked example 1 part (b); Practice Q3, Q8)
- I can reassemble a message from numbered packets and spot a missing one. (Guide: Worked example 2; Practice Q9)
Reasoning
- I can explain why dynamic routing lets data keep flowing when part of a network fails. (Guide: Worked example 1 part (c); Practice Q8)
- I can explain why an open, scalable design lets the Internet grow. (Guide: “What makes the Internet the Internet”; Practice Q5)
- I can justify why a live call might use a protocol that does not resend packets. (Guide: Worked example 2 part (b); Practice Q7)
All ticked? Move on to the Topic 4.2 study guide, Fault Tolerance.