Study Notes
The Internet is a global network of interconnected networks, while the World Wide Web (WWW) is a part of the internet accessed via web browsers. URLs are used to request resources on the WWW, and HTTP/HTTPS are protocols for data transmission. Web browsers retrieve and display web pages using HTML, CSS, and JavaScript. DNS servers translate domain names into IP addresses, and cookies store user data for websites.
- Internet — a worldwide collection of interconnected networks. Example: The internet connects computers globally.
- World Wide Web (WWW) — a part of the internet accessed using web browsers. Example: Websites like Google and Facebook are part of the WWW.
- Uniform Resource Locator (URL) — the address used to request a web page. Example: http://www.example.com
- HTTP/HTTPS — protocols for transmitting data over the WWW. Example: HTTPS is used for secure data transmission.
- Web Browser — software to access and display web pages. Example: Google Chrome and Mozilla Firefox are web browsers.
- HTML — provides the content and structure of web pages. Example: HTML tags define headings and paragraphs.
- CSS — styles the HTML content. Example: CSS changes the color and layout of a webpage.
- JavaScript — adds interactivity to web pages. Example: JavaScript can create dynamic content like slideshows.
- DNS Server — translates domain names into IP addresses. Example: DNS converts www.example.com to an IP address.
- Cookies — small text files storing user data for websites. Example: Cookies remember login details and preferences.
Exam Tips
Key Definitions to Remember
- Internet: A global network of interconnected networks.
- World Wide Web (WWW): A part of the internet accessed via web browsers.
- URL: The address used to request a resource on the WWW.
- HTTP/HTTPS: Protocols for data transmission over the WWW.
- DNS Server: Translates domain names into IP addresses.
- Cookies: Small text files storing user data for websites.
Common Confusions
- Confusing the internet with the World Wide Web.
- Thinking HTTPS is the same as HTTP.
Typical Exam Questions
- What is the difference between the internet and the World Wide Web? The internet is a global network of networks, while the WWW is a part of the internet accessed via browsers.
- How does a DNS server function? It translates domain names into IP addresses.
- Why is HTTPS preferred over HTTP? HTTPS is secure and encrypts data during transmission.
What Examiners Usually Test
- Understanding of how the internet and WWW function.
- Knowledge of protocols like HTTP and HTTPS.
- Ability to explain the role of DNS servers and cookies.