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Diploma in Higher Education Studies

How data travels across the internet

HES 214 · Digital World — Week 4 of 16

CourseHES 214
Week4 of 16
SemesterII
TutorOnline in the course chat

This week’s topics

How data travels across the internet

  1. Packets and IP addresses
  2. Routers

What you will be able to do

  • 1.1 Explain the client-server model.
  • 1.2 Describe the difference between LAN and WAN.

Activity

Simulate sending a message in packets across the classroom.

Study materials

Further resources

  • An Introduction to Computer Networks, 1.3–1.4: Packets and Forwarding · PDF · Dordal, An Introduction to Computer Networks, release 2.0.11, 1.3–1.4: packets and how routers forward them (a step up), pp. 14–17 · for registered students
  • An Introduction to Computer Networks, 1.10: IP – Internet Protocol · PDF · Dordal, An Introduction to Computer Networks, release 2.0.11, 1.10: IP addresses and routers, pp. 24–29 · for registered students
  • Kurose & Ross Wireshark lab: IP · PDF · Kurose & Ross Wireshark lab (v9), hands-on lab: see IP addresses inside real packets · for registered students
  • The design philosophy of the DARPA Internet protocols · Open-access article · Clark (1988), ACM SIGCOMM '88. How packets and routers carry data, from a chief Internet architect. · for registered students
  • Development of the Domain Name System · Open-access article · Mockapetris & Dunlap (1988), ACM SIGCOMM '88. How names are turned into IP addresses, explained by the DNS designers. · for registered students
Materials marked “for registered students” open in the student portal, which is set up as soon as you receive final acceptance.
Course chat

Admitted students ask questions on this week’s page in the student portal: an AI assistant trained on the course answers first, and during the course’s timetabled classes Connect to your tutor brings your tutor into the chat, who may start a call if needed.

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Course plan
  • Week 1: The internet and the World Wide Web
  • Week 2: Clients and servers
  • Week 3: LANs and WANs
  • Week 4: How data travels across the internet
  • Week 5: Strong passwords and password managers
  • Week 6: Two-factor authentication
  • Week 7: Phishing: spotting fake messages
  • Midterm: Midterm evaluation
  • Week 9: Social engineering and online scams
  • Week 10: Cloud computing
  • Week 11: Artificial intelligence in everyday life
  • Week 12: The Internet of Things and smart devices
  • Week 13: Technology and society
  • Week 14: Technology and the environment
  • Week 15: Review and coursework completion
  • Final: Final assessment and submission
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