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Internet Internet Presentation Transcript

  • Fundamentals of INTERNET G.Somashekar ? INTERNET
    • The Internet is a computer network made up of thousands of networks worldwide.
    • Internet is the world’s largest computer network , the network of networks, scattered all over the world.
    • Internet has been coined from two terms, interconnection and network .
  • Fundamentals of INTERNET G.Somashekar NETWORK Network is simply a group of computers that are connected together for sharing information and resources
    • to share resources (files, printers, modems, fax machines)
    • to share application software (MS Office)
    • increase productivity (make it easier to share data amongst users)
    Reasons for Networking
  • Fundamentals of INTERNET G.Somashekar History of Internet 1969 : ARPA (Advanced Research Project Agency) Created ARPANET 1979 : USENET News was launched with Non-govt, academic Network. 1980: US Govt. (National Science Foundation) Setup 5 Supercomputer centres of the Internet. 1990: ARPANET was dismantled and other networks Came up 1993 : NSF created an organisation called InterNIC to set standards. 1995 : NFS move out to become commercial.
  • Fundamentals of INTERNET G.Somashekar Applications of the INTERNET
    • E-Mail : Electronic mail, or e-mail, allows computer users locally and worldwide to exchange messages.
    • Telnet : Telnet is a program that allows you to log into computers on the Internet and use online databases, library catalogs, chat services, and more.
    • FTP : FTP stands for File Transfer Protocol. This is both a program and the method used to transfer files between computers.
    • E-Mail Discussion Groups : One of the benefits of the Internet is the opportunity it offers to people worldwide to communicate via e-mail.
    • Usenet News : Usenet News is a global electronic bulletin board system in which millions of computer users exchange information on a vast range of topics.
  • Fundamentals of INTERNET G.Somashekar Applications of the INTERNET
    • Archie : A search tool used to search for the desired FTP Server, containing a database of most of the files that are publicly available.
    • Chatting and Conferencing : Internet Relay Chat (IRC), a public talk facility which can be used by anyone on the Net at any time.
    • World Wide Web : The World Wide Web (abbreviated as the Web or WWW) is a system of Internet servers that supports hypertext to access several Internet protocols on a single interface
  • Fundamentals of INTERNET G.Somashekar Getting Connected to INTERNET 1. Dial-up Access In this type of connection you connect to the Internet via a modem and regular telephone lines.
  • Fundamentals of INTERNET G.Somashekar Getting Connected to INTERNET 2. Direct or Dedicated Connections A full Internet access by dedicating a leased phone line between the network (or individual PC) and an Internet service provider (such as VSNL or Department of Telecommunication in India).
  • Fundamentals of INTERNET G.Somashekar Getting Connected to INTERNET Domain Name Services Refers to the systematic hierarchical organisation of domain names that helps in locating a computer on the Internet. IP Addresses Each DNS name has a correcsponding numeric address called IP Address that specifies the location of a computer on the internet. IP addresses can be compared with telephone numbers. Ex; 202.54.24.230 usually nonprofit organizations .org network access provder .net U.S. military entity .mil U.S. government entity .gov educational institution .edu commercial enterprise .com
  • Fundamentals of INTERNET G.Somashekar ACCESS THE WORLD WIDE WEB
    • Graphical : Text, images, audio, and video are retrievable through a graphical software program such as Netscape Navigator and Internet Explorer.
    • Text : Lynx is a browser that provides access to the Web in text-only mode.
    Communicating using E-Mail
    • SMTP (Simple Main Transfer Protocol) : Standard Protocol used to transfer mail messages between computers.
    • POP (Post office Protocol) : Defines how mail clients can retrieve messages from a mail server.
    • MIME : Multipurpose Internet Mail Extensions : used to exchange e-mail messages containing non-textual data such as graphics, sound and other multimedia files.
  • Fundamentals of INTERNET G.Somashekar Languages and functions
    • CGI, Active Server Pages: CGI (Common Gateway Interface) refers to a specification by which programs can communicate with a Web server. ASPs are HTML pages that include scripting and create interactive Web server applications.
    • Java/Java Applets : Java is the most famous of the programming languages of the Web. Web-based Java applications are usually in the form of Java applets .
    • JavaScript is a programming language created by Netscape Communications.
    • XML: XML (extensible Markup Language) is a Web page creation language that enables designers to create their own customized tags to provide functionality not available with HTML.
    • HTML : Basic Scripting language to create web pages.
  • Fundamentals of INTERNET G.Somashekar Thank You