Internet and basic services

The internet is a vast network that connects computers all over the world.The internet has its root in the ARPANET system of the Advanced Research Project Agency of the U.S. Department of Defense.ARPANET was the first WAN and had only four sites in 1969.The internet evolved from basic ideas of ARPANET for interconnecting computers.

Basic Services:-

Electronic Mail

E-mail is a computer-based application for the exchange of messages between users.Messages in e-mail service can contain not only text documents but also image,audio and video data. 
 

File Transfer Protocol(FTP)

FTP is a standard internet protocol provided by TCP/IP used for transmitting the files from one host to another.It is used to allows you to transfer multiple files as well as directories.Businesses use FTP to send files between computers,while websites use FTP for the uploading and downloading of files from their websites servers.

Telnet

Telnet,developed in 1969,is a protocol that provides a command line interface for communication with a remote device or server,sometimes employed for remote management but also for initial device setup like network hardware.It is a protocol that allows you to connect to remote computers over a TCP/IP network.

Usenet News

Usenet is a worldwide system for internet discussion that consists of a set of newsgroups that are organized by subject.
 

WORLD WIDE WEB(WWW)

The world wide web-commonly referred to as WWW,W3 or the web-is an interconnected system of public webpages accessible through the internet.The web is not the same as the internet:the web is one of many applications built on top of the internet.Ex:internet.
 

WWW BROWSERS-

A web browser or simply browser is an application used to access and view websites.It is an application program that provides a way to look at and interact with all the information on the world wide web.Ex:Internet Explorer,Google Chrome,Mozilla FireFox,Apple Safari,NetScape and MacWeb.
 

INTERNET SEARCH ENGINES

A search engine is a software program that helps people find the information they are looking for online using keywords or phrases.
Major elements of internet search engines:
  • Search request interface
  • Information discoverer
  • Presenter of search results
Some Popular Internet Search Engines:
  1. HotBot
  2. Yahoo
  3. Lycos
  4. Infoseek
  5. Google
  6. Inference Find and Ixquick.
 

USES OF THE INTERNET

  1. Online communication.
  2. Software sharing.
  3. Exchange of views on topics of common interest.
  4. Posting of information of general interest.
  5. Organization promotion.
  6. Product promotion and feedback about products.
  7. Customer support service.
  8. Online shopping.
  9. Worldwide video conferencing.
  10. Worldwide web casting.
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