Module C · Internet & its Applications
Curriculum hours: 31 · Examined in: Paper 1 · Feeds: Elective 2B Web Application Development
This module explains how the Internet is built (networking), what services it offers (services), how simple web pages are made (web authoring), and how to stay safe online (security).
Chapter map
| Chapter | Sub-topics | Hours |
|---|---|---|
| 1 · Networking & Internet Basics | LAN/WAN, IP, hardware, media, TCP/IP | 9 |
| 2 · Internet Services & Applications | URL/DNS, HTTP/HTTPS, formats, streaming | 5 |
| 3 · Elementary Web Authoring | HTML basics, publishing | 3 |
| 4 · Threats & Security | Threats, defences, encryption, authentication | 14 |
What you will be able to do
- Compare LANs and WANs; explain IPv4 / IPv6; identify common networking hardware.
- Describe the Internet's basic services and protocols.
- Read simple HTML and explain how a page reaches the browser.
- Recognise common threats and recommend defences for a Hong Kong context.
- Explain encryption, authentication, digital certificates, and e-commerce security.
Study tips
- Use diagrams for every network concept. A picture of "browser → DNS → web server" beats a paragraph.
- For security, build a threat → defence flashcard set.
- Try connecting to a friend's hotspot, then open browser developer tools — see real packets travelling.
➡️ Start: Chapter 1 · Networking & Internet Basics