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Network Basics & Internet
- 1. Basics of Networking & Internet Services Government of India Ministry of Communication & Information Technology Department of Information Technology National Informatics Centre Training Division, New Delhi
- 11. Model of Internet Setup Internet Media Finance Computers Real Estate Education Health Government Universities Business Server User Client
- 12. How it all works ? CGI User C L I E T HTTP TCP/IP SERVER Docs
- 14. What is the World Wide Web? The World Wide Web (WWW) is a global interactive, dynamic, cross platform, graphical hypertext information system that runs on the Internet.
- 16. What is a Web Browser? A Web Browser is special software such as Netscape, Mosaic or Internet Explorer. These browsers allow a user to view Web pages delivered from a client server (Web Site) situated at a particular URL on the World Wide Web
- 17. Netscape
- 19. Basic Terminology used in Internet Technology * World Wide Web ( www ) * Web site * Portal * Uniform Resource Locater * Home page * Hyperlink * Server s/w * Browser s/w * Protocols like TCP/IP, HTTP,FTP * ISP ( Internet Service Provider )
- 20. A web Page is a single document written in HTML ( Hypertext Markup Language ) that includes the text of the document,its structure, any links to other documents and graphic images and other media. HTML- WWW documents are authored using the Hypertext Markup Language. Homepage is a Hypertext document a server will serve as default.
- 21. HYPERTEXT
- 22. HTML
- 23. Uniform Resource Locator - Method of accessing Internet Resources - URLs are used by web browsers to connect you directly to a specific document or homepage on WWW, without having to know where that resource is physically located.
- 25. What is a protocol? In networking and Communications, the formal specification that defines the procedures to be followed when transmitting and receiving data. Protocols define the format, timing, sequence and error checking used on the network. HTTP- Hypertext Transfer Protocol is the stateless protocol used for data transfer within WWW.
- 35. Email application Client Server Client Email client sends message to server Message is stored on POP server Later, recipient’s email client retrieves message from server
- 36. Chat application Client Server Client Chat clients send user’s typing to server Chat server aggregates typing from all users and sends to all clients Other user’s clients display aggregated typing from chat server
- 37. Visit the World Wide Web via the Internet Come and take your first trip into Cyber Space... It won’t be your last !
- 38. Thank You…. For further information and suggestions please contact Training Division National Informatics Centre A-block, CGO Complex Lodhi Road, New Delhi-110003 E-mail:trghq@alpha.nic.in Website: http://training.nic.in
Notas del editor
- Key Concepts: This slide defines a search engine --a tool that can search through web pages and sort them according to specified keywords. Search engines are essential for researching the Internet: they have the ability to locate and sort through millions of web pages. Activity: The facilitator may choose to generate discussion by asking students to explain what a search engine is. Click after globe appears for the answer to the title question.
- Activity: The facilitator may ask students about they types of search engines they use. They will list many for you--Yahoo, Alta Vista, Excite, Lycos, Hotbot, Infoseek, Northern Light, Snap, Dogpile, etc. Key Concepts: Each search engine searches the web in a slightly different way. Also, companies or individuals often must register their web sites with these different search engines, so the list that comes up on Yahoo may be completely different from the one that comes up on Lycos. A wide variety of search engines may be accessed at the OWL web site, located at owl.english.purdue.edu. When researching a topic, it is also a good idea to do some brainstorming about the best places on the web to locate information. Government agencies and non-profit groups may host web sites that offer useful information. Activity: The facilitator may choose either now or after the presentation to minimize the PowerPoint presentation, access Netscape or another Internet browser, or go the the collection of search engines on the OWL web site.
- Key concepts: This slide offers tips for using search engines. Since search engines do not all work in exactly the same way, it is a good idea to read the directions of your selected search engine prior to conducting a search. Also, using Boolean operators --words like “AND” and “OR”--can help to tailor a search to your needs. It is also a good idea to brainstorm a list of keywords that might fit your topic. The slide offers an example for a search on the tobacco lawsuits and settlements. Depending on the angle of your topic, you might choose a variety of these terms in combination with each other.
- Key Concepts: After using search engines to locate some potentially helpful web sites, your next step is to identify the site. This involves determining the authorship, content, and purpose of the web site.