World Wide Web
The WWW, HTTP, Browsers, and the Web Standards
What is WWW? - It stands for the World Wide Web, which is most often called the web. - The web is a network of computers all over the world. - All the computers that are connected to the web uses a protocol called HTTP to communicate with each other.
What is HTTP? - It stands for the Hypertext Transfer Protocol. - It is a networking protocol for distributed, collaborative, and hypermedia information systems. - It is the foundation of data communication for the World Wide Web. - It functions as a request-response protocol in the client-server computing model.
- In HTTP, a browser act as a client and a website act as a server.
How does the WWW work? - Web information is stored in documents called Web pages.
- Web pages are files stored on computer called Web server.
- Computers reading the web pages are called Web clients.
- Web clients view the pages with a program called a Web browser.
- Example: IE, Firefox, Chrome, Opera, Safari
What is a Web Browser? - It’s a software application for retrieving, presenting, and traversing information resources on the World Wide Web.
- It is made to read Web applications, HTML documents and display them as a web page.
How does the web browser work? - A browser fetches a Web page from a server by a request.
- A request is a standard HTTP request containing a page address.
- A page address looks like: http://www.w3schools.com/
- All Web pages contain instructions on how to be displayed.
- The browser displays the page by reading these instructions.
- The most common display instructions are called HTML tags/elements.
- Example: Hello World…
Web Browser’s rendering engine - A web browser engine (sometimes called a layout or rendering engine), is a software component that takes marked up content such as HTML and formatting
What is WWW? - It stands for the World Wide Web, which is most often called the web. - The web is a network of computers all over the world. - All the computers that are connected to the web uses a protocol called HTTP to communicate with each other.
What is HTTP? - It stands for the Hypertext Transfer Protocol. - It is a networking protocol for distributed, collaborative, and hypermedia information systems. - It is the foundation of data communication for the World Wide Web. - It functions as a request-response protocol in the client-server computing model.
- In HTTP, a browser act as a client and a website act as a server.
How does the WWW work? - Web information is stored in documents called Web pages.
- Web pages are files stored on computer called Web server.
- Computers reading the web pages are called Web clients.
- Web clients view the pages with a program called a Web browser.
- Example: IE, Firefox, Chrome, Opera, Safari
What is a Web Browser? - It’s a software application for retrieving, presenting, and traversing information resources on the World Wide Web.
- It is made to read Web applications, HTML documents and display them as a web page.
How does the web browser work? - A browser fetches a Web page from a server by a request.
- A request is a standard HTTP request containing a page address.
- A page address looks like: http://www.w3schools.com/
- All Web pages contain instructions on how to be displayed.
- The browser displays the page by reading these instructions.
- The most common display instructions are called HTML tags/elements.
- Example: Hello World…
Web Browser’s rendering engine - A web browser engine (sometimes called a layout or rendering engine), is a software component that takes marked up content such as HTML and formatting