HTTP & WWW

powerpoint presentation about HTTP and WWW or World Wide Web these Information may not be 100% accurate, so you have to make your own research.

1. “Network Course” CBA in King Saud University WWW & HTTP Presented by: Razan Al Saif Halah Alem Noura Al Mutlaq

2. What is URL?

3. What is HTTP?

4. HTTP connections

5. HTTP session consist of three phases:

6. Methods

7. HTTP Request / Response Communication between clients and servers is done by requests and responses: A client ( a browser) sends an HTTP request to the web An web server receives the request The server runs an application to process the request The server returns an HTTP response (output) to the browser The client (the browser) receives the response

8. The HTTP Request Circle

9. The message format consists of the following 3 items:

10. START LINES All HTTP messages begin with a start line. The start line for a request message says’what to do’. The start line for a response message says what happened.

11. Headers HTTP message headers are used to precisely describe the resource being fetched or the behaviour of the server or the client. There are four types of HTTP message headers: General headers

12. 2. Request headers

13. 3. Response headers

14. 4. Entity headers

15. HTTP VS HTTPS

16. World Wide Web ‘W W W’or ‘W3’or ‘web’

17. What is World Wide Web ? The World Wide Web is a way of exchanging information between computers on the Internet. The World Wide Web is the network of pages of images, texts and sounds on the Internet which can be viewed using browser software .

18. The World Wide Web The World Wide Web, or Web, consists of a worldwide collection of electronic documents (Web pages) A Web site is a collection of related Web pages and associated items A Web server is a computer that delivers requested Web pages to your computer Web 2.0 refers to Web sites that provide a means for users to interact

19. History

20. WWW Components 1. Structural Components : Clients/browsers Servers Caches Internet 2. Semantic Components: Hyper Text Transfer Protocol (HTTP) Hyper Text Markup Language (HTML) Extensible Markup Language (XML) Uniform Resource Identifiers (URIs)

21. -The Fundamental Concept of World Wide Web- Hypertext is text which contains links to other texts . Hypermedia is a term used for hypertext which is not constrained to be text: it can include graphics, video and sound 1. The Hypertext concept 2. The Hypermedia concept

22. Web Browser: A web browser displays a web document and enables users to access web documents. Web Server: This is a program that waits patiently for the browser to request a web page. The servers looks for the requested information, retrieves it and send it to the browser or sends an error message if the file is not found URL (Uniform Resource Locator): These are the web addresses. The resource locator is an addressing system .

23. Most popular browsers

24. Is Web an Internet ? Many people use the terms Internet and World Wide Web, but in fact they’re are not the same. The Internet and the Web are two separate but related things. The Internet is a massive network of networks. It connects millions of computers together globally. The W e b , is a way o f a c c e s sing information over the medium of the Internet. *So the Web is just a part of the Internet, actually a large Part, but the two terms are not synonymous and should not be confused.*

25. Summary WWW is a way of exchanging information. Tim Berners Lee invents the World Wide Web (www) at Cern . WWW is constructed using HTML. Internet and WWW are the two different concept.

26. Differences between HTTP and WWW: HTTP is the protocol used to transfer data to and from the website. WWW is the identifier that indicates that it is a web site and it uses the HTTP protocol. HTTP://anything.com, WWW.anything.com, HTTP://WWW.anything.com leads to the same site. Any prefix that is not reserved to a protocol can be used as a sub domain.

27. Thank You