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Introduction to the Internet Present by: Selvakumar (Tech Lead, Senior Software Engineer, at ADT) & Part time Lecturer at Info Tech Sys

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Presentation on theme: "Introduction to the Internet Present by: Selvakumar (Tech Lead, Senior Software Engineer, at ADT) & Part time Lecturer at Info Tech Sys"— Presentation transcript:

1 Introduction to the Internet Present by: Selvakumar (Tech Lead, Senior Software Engineer, at ADT) & Part time Lecturer at Info Tech Sys Email: anselva@yahoo.com Web: www.nselva.com

2 Definition What is Internet? Global Connection of Computer NetworksInterconnected …by CABLES OR Wireless

3 Internet

4

5 VoIP

6 Global System for Mobile communications (GSM) GSM

7 Internet Services Direct Communication Online Conferencing Distributed Information Resources File Transfer

8 History

9 Evolution 1969Birth of Internet - ARPANET Early 80’s E-Mail 1991WWW - World Wide Web

10 Basic concepts: IP (Internet Protocol) – Number to identify computers DNS (Domain Name Server) – maintains a relationship between IP addresses and domain names ICANN (Internet Corporation for Assigned Names and Numbers) Register domain name eg: www.register.comwww.register.com Basic concepts

11 ISP ( Internet Service Provider) Ex: SLT, Suntel, Dialog, Airtel, …etc Terminology

12 Internet Connection Internet Your PC Modem or Router Phone ISP SLT, Lanka bell, Eureka, etc

13 Wireless Internet Connection

14 Connecting  Dial-up Connection  Dial-up Connection–needs MODEM, Phone line and ISP account]  ISDN  ISDN - (Integrated Services Digital Network) - Digital telephony scheme that allows a user to connect to the Internet over standard phone lines at speeds higher than a 56K modem allows

15  ADSL - (Asymmetric Digital Subscriber Line) is a technology for transmitting digital information at high bandwidths on existing phone lines.  Unlike regular dialup phone service, ADSL provides a continuously-available connection. Connecting

16  Cable Internet - Uses a cable modem designed to operate over cable TV lines.  Because the coaxial cable used by cable TV provides much greater bandwidth than telephone lines, a cable modem can be used to achieve extremely fast access to the World Wide Web. Connecting

17 How websites are working? Your Machine ISP – Internet Service Provider DNS: www.nselva.com Who is look-up? IP: 74.220.215.243

18 How websites are working?

19  Web Browser Browsers

20 Email

21 Terminology Web Page VS Web Site Any Ideas??? Web Page VS Web Site Any Ideas???

22 Terminology HHTTP = Hypertext Transfer Protocol HHTML = Hypertext Mark-up Language

23 HTML: Sample <html> <head> <title>Example</title> </head> <body> <p><font face="Arial"><br> <font color="#FF0000">Click here to see my pictures:</font></p> <p><a href="http://www.mysite.com/photos.html">My photograhps</a></p> </body> </html>

24 How can build a web site? 1.Register Domain Name 2.Hosting 3.Website design and development

25 URL: Sample Internet Protocol Domain Name File Path

26 Domains Etc…

27 After one creates a web-page or site one needs to upload it onto the internet. Example of Free hosting: www.freeservers.com www.fortunecity.com Otherwise one needs to pay for professional hosting services. ISP’s may offer this service. Hosting

28 Internet Applications

29 XML - eXtensible Markup Language XML XML is not a replacement for HTML. In most web applications, XML is used to transport data, while HTML is used to format and display the data. Siva Karan Reminder Don't forget me this weekend!

30 Web Designing

31 Web Development Languages

32 Credit Card Transaction Process

33 How technology changed us........

34 www.nselva.com - My personal website www.sevanthi.com - Download MP3 Songs www.kumbam.com - Matrimonial www.uoctamil.com - Colombo University Tamil Students www.x-rates.com - Exchange Rates www.cse.lk - Colombo Stock Exchange www.mathagal.com - Our Village www.cricinfo.com - Cricket Information http://kerni.jaffnahindu.org - Jaffna Hindu College Old boys Useful Websites

35 Some websites…

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48 Questions??????

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