The document discusses how the internet works and its key features. It describes how the internet is a network of networks that allows for worldwide communication through features like the World Wide Web, email, and search engines. It explains how internet connections are established through hardware like modems and software like web browsers. Factors that can affect internet speed are also outlined, such as modem speed, phone line quality, and internet traffic. The document also covers internet protocols, how email works, popular websites, search engines, and the differences between static and dynamic websites.

1. INTERNET Non-Major, Unit IV

2. Introduction In the past Stand alone Needed tape or disk to share files Network Effective way to share resources Type of Network LAN MAN WAN

3. Internet Network of Networks Important features WWW – World Wide Web Direct Communication – E-mail, Messages Round the Clock – Availability Search Engines – Google Advertisement News and services - BBC,BBS

4. Working of Internet Hardware Serial port to connect Modem Modem – Modulator de Modulator Cable with Jacks and Sockets to connect with Comp Software Windows Web Browser – Internet Explorer, Google Chrome..

5. Working of Internet Others Telephone Connection Internet Account – ISP Speed Measured by Mbps – 1 – 2 Mbps to Home Factors Affecting Speed Speed of the Modem - Min 56 kbps Quality of Phone – Noise will distrub Internet Traffic

6. Working of Internet Others Telephone Connection Internet Account – ISP Speed Measured by Mbps – 1 – 2 Mbps to Home Factors Affecting Speed Speed of the Modem - Min 56 kbps Quality of Phone – Noise will disturb Internet Traffic

7. Working of Internet Factors associated with your computer Low Processor (650 MHz) Soln: Fast Processor Low memory (256 Mbps) Soln: More Memory (1 GB) Highly fragmented Hard Disk Soln: Keep defragmented

8. IP ADDRESS Internet Protocol DNS Communication Protocol Protocol – Formal set of rules and conventions TCP/IP – Transmission Control Protocol TCP – Establish Connections IP – Send a packet from Computer A to Computer B

9. E - Mail Send and Receive messages Cost is same as making a local call Can send any type of file – Video, Audio Send any number of recipients

10. Sending E-Mail

11. Sending E-Mail Sending Attachments Send a file along with a mail WinZip Dangerous because of Virus

12. Popular Internet websites Hotmail - www.Hotmail.com Rediffmail - www.Rediffmail.com Gmail - www.Gmail.com Mailcity - www.mailcity.com

13. Popular Search Engines Yahoo - www. Yahoo.com Google - www. Google.com Altavista - www.Altavista.com Ask Jeeves - www.Ask.com

14. Web Design Two types of Web sites Static Websites Dynamic Websites Static Websites Regenerated every time user requests from the server Suit to small and medium business Does not require any databases HTML can be used to create static Websits

15. Web Design Dynamic Websites Regenerated every time user visits Contents tailored based on date, user country..etc Suit to all sizes of business require regular updates CGI, ASP, JSP, PHP used to develop dynamic websites Examples – Yahoo, IBM, Microsoft..etc