Lesson 6

What is the World Wide Web?

  • A system of internet servers that support specially formatted documents
  • The documents are formatted in a markup language called HTML (HyperText Markup Language)
  • This type of format supports links (hyperlinks) to other documents, as well as graphics, audio, and video files
  • Hyperlinks enable you to jump from one document to another simply by clicking on hot spots
  • Not all Internet servers are part of the World Wide Web
  • There are applications called Web browsers that make it easy to access the World Wide Web, such as Chrome and Mozilla Firefox
  • Attention! World Wide Web and the Internet are not the same thing!

URL - Uniform Resource Locator

  • The DNS (Domain Name System) is responsabile for converting the address you type into the IP address at which the address is pointing
  • Take the following address: http://www.stmichaelschool.edu.mt/computing/Internet/lesson6.html and split it up
    • WWW – World Wide Web
    • stmichaelschool.edu.mt - the domain name
    • computing/Internet - 2 folders
    • lesson6.html - the file being viewed

Hyperlinks

  • Hyperlinks are links within a web page that when clicked on open another webpage
  • Hyperlinks can be set both on text and graphics
  • Hyperlinks can detected by moving the mouse pointer over text or graphics in a web page and the mouse pointer changes into a hand
Opening a Web Page
  • When opening a web page the whole file together with the graphics are downloaded (saved) on your storage media
  • These files are stored as the temporary internet files
  • After the file is downloaded then it is opened and viewed on screen
Uploading a Web Page
  • A web page is stored on a Web Server
  • A user can buy web space (amount of space from the web server's hard disk)
  • There are web servers that offer free web space - but include an advertisement on your web page
  • On this web space the user can upload an html document, graphics, audio or video files
  • When uploading the user is copying a file form his/her hard disk to that of the web server
  • Once the file is uploaded it will have an internet address such as: www.webs.com/compst (the address depends on the name of the web server you are uploading to)


Assignment 6

Send an e-mail with the following information:


To:   [email protected]
Subject:   your name, surname and class - assignment 6
Main Text:   Answer the following questions:
1) List 4 web browsers
2) What is the use of a web browser?
3) What is the difference between the Internet and the World Wide Web?
4) What is the difference between uploading and downloading?


References

  • Webopedia Computer Dictionary (on-line): http://www.webopedia.com/DidYouKnow/Internet/2002/Web_vs_Internet.asp