internet and its services

internet and its services

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  CONTENTS Definition And History Basic services of INTERNET The World Wide Web (W.W.W.) WWW browsers INTERNET search engines Uses of INTERNET
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  DEFINITION AND HISTORY The INTERNET is a network of computers, which links many different types of computers all over the world.  ARPANET was the first WAN and had only four sites in 1969.  In 1989, the U.S. government lifted restrictions on the use of INTERNET, and allow its usage for commercial purposes as well.
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  Basic Services OfThe INTERNET  Electronic Mail (E-Mail) – Allow user to send a mail (message ) to another internet user in any part of the world in a near-real-time manner .  File Transfer Protocol (FTP) – Allow user to move a file from one computer to another on the internet.  Telnet – Allow a user to log into another computer somewhere on the internet .
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  Electronic Mail  E-Mailis a rapid and productive communication tool because :  It is faster than Paper Mail .  Unlike telephone, The persons communicating with each other need not to be available at the same time.  Unlike Fax documents , Email documents can be stored in a computer and be easily edited using editing programs. E-Mail is a rapid and productive communication tool because : File Transfer Programs.
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  File Transfer Protocol(FTP)  Moving a file from a remote computer to ones own computer is known as Downloading.  Moving a file from ones own computer to a remote computer is known as Uploading.  Anonymous FTP site in a computer allows a user to log in with the username of anonymous and password that is user’s E-mail Address.  Anonymous FTP sites are called publically accessible sites because they can be accessed by any user on internet.
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  TELNET Some common usesof telnet service are -:  Using the computing power of the remote computer.  Using a software on the remote computer.  Accessing remote computers data base or achieve.  Logging into ones own computer from another computer.
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  The World WideWeb (WWW)  World Wide Web or W3 is the most popular and promising method of organizing and accessing information on the INTERNET.  Hypertext is a new way of information storage and retrieval that enables authors to structure information in novel ways.  A properly designed hypertext document can help users to locate desired type of information rapidly.  Hypertext documents enable this by using a series of link.  A link is a special type of item in a hypertext document connecting the document to another document.  Hypertext documents on internet are known as Web Pages.
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  WWW Browsers  Touse a computer as a Web client, a user needs to load on it a special software tool known as WWW Browser.  Browser provide following navigation facilities –  Do not require a user to login to a server computer.  Enable a user to visit a server computer’s site directly and access information on it by specifying its URL (Uniform Resource Locator).  Enable user to create and maintain a personal hotlist of favorite URL.  Maintain a history of server computers visited by user in a surfing session.  Enable a user to download information in various formats.
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  INTERNET SEARCH ENGINES Internet search engine is an application, which helps users to locate Web sites containing useful information and references.  To search Information :  A user types the description of the information using the user interference of the search engine.  The search engine then searches the requested information on the WWW and returns the results to the user.
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  Major Elements ofInternet Search Engines  Search Request Interface enables users to provide description of desired information to the search engine  search engine may allow specifications of simple keywords and phrases, combination of keywords and phrases using Boolean operators and exclusion/inclusion operators, and title and URL limiters Information Discoverer  Discovers information from the WWW and creates a database for the search engine.  Search engine uses the database to locate useful information during the search process. Presenter of search results  search engines often list search results in accordance to a relevance score.  Relevance scores reflect the number of times a search term appears in a web page. Some search engines also allow users to control relevance score by giving different weights.
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  World Internet UserIn 2017
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  Uses Of Internet:-  Some important current strategic of the INTERNET are :  On-line communication  Software sharing  Exchange of views on topics of common interest  Posting of information of general interest  Organization promotion  Product promotion and feedback about products  Customer support service  On-line journals, magazines, Encyclopedia, and dictionary  On-line shopping  World-wide conferencing
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  Quote The Internet islike alcohol in some sense. It accentuates what you would do anyway. If you want to be a loner, you can be more alone. If you want to connect, it makes it easier to connect. by Esther Dyson