# Mandatory Reading on How the Internet Works {% hint style="warning" %} Please go through these materials before TechUp. These materials will be covered in the quiz on 14 May (30 MCQ, 70% score to pass TechUp). {% endhint %} |

Code.org YouTube playlist: How Computers Work

  1. Introducing how computers work
  2. What makes a computer, a computer?
  3. Binary & data
  4. Circuits & logic
  5. CPU, memory, input & output
  6. Hardware and software
| 25 min | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------ | |

Code.org YouTube playlist: How the Internet Works

  1. What is the Internet?
  2. Wires, Cables & Wifi
  3. IP Addresses & DNS
  4. Packets, Routing & Reliability
  5. HTTP & HTML
  6. Encryption & Public Keys
| 45 min | | [What happens when you type a URL in the browser and press enter?](https://medium.com/@maneesa/what-happens-when-you-type-an-url-in-the-browser-and-press-enter-bb0aa2449c1a) (Login to Medium required) | 7 min |