ICT - E-Communication

 Name : Madhavi Sivalenka

      Gmail : madhavi.sivalenka@gmail.com

 Preparation

E-Communication

What is Computer Network?

n  Group of Interconnected Computers

n  Information Exchange

n  Resource Sharing

n  E-Communication

 

Network Classification

n  LAN (Local Area Network)

n  Upto 1 Kilometer

n  Room, Building, Campus

n  MAN(Metropolitan Area Network)

n  1 to 10 Kilometer

n  City

n  WAN(Wide Area Network)

n  10 to 1000 Kilometer

n  Country, Continent

n  Internet

n  Worldwide

Components of LAN

n  Computers                             

n  LAN Cables                             

n  Network Adapter Cards

n  Electronic Switch

n  Network Operating System Software

             Novell,  Windows,  Linux

Internet

n  A network of computer networks which operates world-wide using a common set of communications protocols

n  An internet is a group of networks connected together.

n  The worldwide, interconnected system of computer networks

Use of Internet

n  Communicate with other people

n  Email

n  Internet news

n  Chatting and Conferencing

n  Getting Information

n  Connect to remote computer system

Getting Internet Connection

n  Contact to ISP(Internet Service Provider)

            - A company that provides access to the Internet.

            BSNL, VSNL, Siffy, Reliance, Hathway cable etc.

n  Internet Connection options

n  Dial up access

n  ISDN (Integrated Services Digital Network)

n  Broadband

n  Dedicated Leased Line - Cable

n  Dedicated Leased Line - Frame Relay

WWW (World Wide Web)

n  A system of Internet servers that support specially formatted documents

n  The documents may have links to other documents, graphics, audio, video.

Web Site

n  A site (location) on the WWW.

n   Each Web site contains a home page, which is the first page.

n  The site might also contain additional pages.

n  Each site is owned and managed by an individual, company or organization.

Web Site Names

            .com                Commercial Organization

            .net                  Network Service Provider Organization

            .edu                 Academic Organization

            .gov                 Government Organization

            .mil                  Military operations

            .org                  Non commercial Organization

            .in                    India

            .pk                   Pakistan

            .uk                   United Kingdom

Web Browser

n  A software used to locate and display Web pages.

                        -Internet Explorer

                        -Netscape Navigator

                        -Mozilla

Search Engine

n  A program that searches web sites, which contains given word.

n  It gives us the list of pages in web sites where given word is found.

n  Google

n  Yahoo

n  Khoj

E-mail

n  The transmission of messages over communication network.

n  The messages entered from the keyboard

n  The message can contain Text, Picture, Sound, Video.

Opening E-mail Account

n  Open website of e-mail account providers

            - www.rediff.com

            - www.yahoo.co.in

            - www.hotmail.com

n  Register as new user

n  Follow the procedure specified on website