1. Computer SystemsComputer Systems Part 2: Understanding The InternetPart 2: Understanding The Internet

2. What is the Internet? wikipedia.org: “The Internet is a global system of interconnected computer networks that interchange data by packet switching using the standardized Internet Protocol Suite (TCP/IP). It is a ‘network of networks’...”

3. Network of networks?

4. PC Printer PC Switch & Firewall The Internet Why a cloud? The Internet Why a cloud? LAN Switch & Firewall LAN Server

5. Packet Switching?

7. TCP/IP?

8. Internet Protocol (IP) is a system for addressing computers on the Internet Domains (www.ichk.edu.hk) resolve into IP addresses (208.112.65.65) Transmission Control Protocol (TCP) is a system for moving data over the Internet Tries to ensure that all data makes it from source to destination

9. Now Explain It Back Given what you have learned, work together as a class to create a role play showing the main features of the Internet. Do you have any questions you need answering? If so, ask…

10. A Final Note The Internet is NOT the Web Can anyone explain the difference?

11. Finally… Write a short piece (200-400 words) explaining what the Internet is and how it functions.

12. Licensing All original work used here is licensed under the Creative Commons Attribution- Noncommercial-Share Alike 3.0 Hong Kong License. For more details please look http://creativecommons.org/licenses/by-nc-sa/3.0/hk/. http://creativecommons.org/licenses/by-nc-sa/3.0/hk/ This license has been chosen to permit a high degree of sharing, whilst protecting the author’s control as to how the content is used. Please respect this license and use accordingly! Recycled and borrowed works from other sources are used under appropriate licenses, which are not affected by this license. The original source is always given. All original work created by Ross Parker (International College Hong Kong), except where specified.

13. Credits Circuit Board Photo By R. Butler on FlickrR. Butler on Flickr Available under Creative Commons, BY-SA Internet Visualisation By Matt Britt on WikipediaMatt Britt on Wikipedia Available under Creative Commons, BY