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Presentation on theme: "DATA COMMUNICATION DONE BY: ALVIN SAMPATH CARLVIN SAMPATH."— Presentation transcript:



3 The World Wide Web (WWW), computer-based network of information resources that combines text and multimedia. The information on the World Wide Web can be accessed and searched through the Internet, a global computer network. The World Wide Web is often referred to simply as “the Web.” The Web started to become a popular resource after it was first widely distributed browser provided a convenient way to access a variety of information on the Internet. The Web uses multimedia, which means that information can be displayed in a wide variety of formats. Users can read text, view pictures, watch animation, listen to sounds, and even explore interactive virtual environments on the Web. A user can move seamlessly from a document or Web page stored on the computer to a document or Web page stored on another computer.

4 HTTP Protocol for World Wide Web: the client/server protocol that defines how messages are formatted and transmitted on the World Wide Web. Full form HyperText Transfer Protocol.

5 URL URL (Uniform Resource Locator), an address that points to a particular document or other resource on the Internet, used most frequently on the World Wide Web (WWW). A computer user can visit an Internet document by typing its URL into a Web browser or similar application used to access the Internet. The first part of the URL, the part before the colon, represents the scheme, or protocol, used to retrieve the document. The next part of the URL, is called the domain name. It represents the overarching Internet address used by a particular organization or individual. Each domain name includes an extension, which identifies the type of organization using the address. URLs are case-sensitive, which means that uppercase and lowercase letters are considered different letters, so a user has to enter a URL with all letters in the correct case.

6 FTP File Transfer Protocol or FTP, in computer communications, on the Internet and other networks, a method of transferring files from one computer to another. The protocol is a set of rules that ensures a file is transmitted properly to the receiving computer. A computer that stores files that can be retrieved using FTP is called an FTP site or FTP server. FTP is part of the Transmission Control Protocol/Internet Protocol (TCP/IP), the system that enables different types of computers and networks on the Internet to communicate. Another application, known as the File Transfer Protocol (FTP), is used to download files from an Internet site to a user’s computer. The FTP application is often automatically invoked when a user downloads an updated version of a piece of software.

7 UPLOADING AND DOWNLOADING UPLOADING transfer data: to transfer data or programs, usually from a peripheral computer to a central, often remote, computer DOWNLOADING to transfer or copy data from one computer to another, or to a disk or peripheral device, or be transferred or copied in this way

8 WEB BROWSER Web Browser, in computer science, a program that enables a computer to locate, download, and display documents containing text, sound, video, graphics, animation, and photographs located on computer networks. A web browser downloads information over phone lines to a user’s computer through the user’s modem and then displays the information on the computer

9 HTML/ XHTML HyperText Markup Language (HTML) is a text-based language used to create web pages for display by a web browser. It is a formatting language, since it consists of codes which instruct the browser how to create, format and display the information on the web page. The data to be displayed on the pages is written as plain text and the formatting codes are written amongst the data (appearing to 'mark up' the data) in the document. The marks are shown as tags, recognised by the brackets around each formatting code. HTML does not give the user information about the data on a page; it simply describes where things go and how they work. Extensible HyperText Markup Language, text format, commonly known as XML, created to structure, store, and send electronic information, especially on the World Wide Web. In appearance, XML is similar to Hypertext Markup Language (HTML), which is used to create pages on the Web. The main difference between the two is that HTML determines how Web pages look whereas XML categorizes information on a Web page. With XML it is possible to produce an electronic document or online form that can be read by an application, such as a Web browser, looking for such key data fields The use of XML is popular for business-to-business communication because it allows companies to create XML tags unique to their industry

10 WEB PAGE WEB PAGE a computer file, encoded in HyperText Markup Language HTML and containing text, graphics files, and sound files, that is accessible through the World Wide Web

11 WEB SITE Web Site, in computer science, file of information located on a server connected to the World Wide Web (WWW). The WWW is a set of protocols and software that allows the global computer network called the Internet to display multimedia documents. Web sites may include text, photographs, illustrations, video, music, or computer programs. Web sites generally offer an appearance that resembles the graphical user interfaces To find a web site, a user can consult an Internet reference guide or directory, or use one of the many freely available search engines.

12 WEB SERVER A program providing Web pages: a program that serves up Web pages when requested by a client, e.g. a Web browser

13 BIBLIOGRAPHY We got our information from Encarta Encylopedia 2008.


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