INTERNET & ITS USE!
Internet is a worldwide, publicly accessible network of interconnected computer networks that allows sharing or networking of files and information at remote sites from other academic institutions, research institutes, private companies, government agencies and individuals using the Transmission Control Protocol or Internet Protocol. It is an essential medium for communicating and interacting with people worldwide, and to access the tremendous amount of information available on it. Millions of people use internet everyday for business transactions or for personal use.Internet refers to the hardware and the media used for forming a global and grand computer network, called the Network of Networks. Internet is a global network, which links a large number of autonomous systems, Intranets, Local Area Networks (LAN), Metropolitan Area Networks (MAN), and Wide Area Network (WAN). No organization owns and controls the Internet. But, it operates in the public domain.
On the other hand, World Wide Web (WWW) is just one of the ways information can be disseminated over the Internet. Other ways of sharing and viewing information over the Internet are: e-mailing, instant messaging, file sharing etc. Therefore, WWW is considered as an application that runs on the Internet.
A web site is a document in hypertext form, which includes text, graphics, voice-clips and video-clips. It provides access points to other sites on the Internet. The World Wide Web comprises of over one million web sites and over 1.4 billion web pages.
A web portal is a web site hosted on a huge web server. It has a large knowledge base. Its presentation is artistic. It has a specific theme and aim. It offers the usual services like site documents service, e-mail service, search engine, user registration etc. It provides all these Internet services to specific group users such as students, job-seekers, doctors, music-lovers, and health conscious persons.
To attend a Quiz on WWW & Internet click here...
To attend a Quiz on WWW & Internet click here...
Services provided on the Internet
Presently, many services are available through the Internet. Some of them are as follows:
1. E-mail
2. World Wide Web
3. File Transfer and anonymous File Transfer
4. Telnet
5. News and USENET
6. The Gopher
7. Wide Area Information Service (WAIS)
8. Internet Relay Chat (IRC)
9. Web casting of Video
10. e-Commerce
Electronic mail or e-mail, is one of the most important services provided on the Internet. About 5% of all usage of the Internet is for e-mail messages. The only requirement for e-mailing between two parties (sender and receiver) is that they need to have an account with their respective ISPs for availing this service.
The Internet provides a wealth of information on virtually any topic. To help users locate information, many web sites provide search engine that explore the Internet and maintain searchable records containing information about web site content. When the user enters a word or phrase, the search engine returns a list of hyperlinks to sites that satisfy the search criteria.
Search engines such as Google, Yahoo, AlltheWeb, AltaVisa and Lycos store information in data repositories called databases that facilitate quick information retrieval. Each search-engine site has different criteria for narrowing searches, such as publishing data, language and relevance. With multiple search engine, users are provided with best results while searching for some desired content.
Sites such as MSN (www.msn.com) and Metacrawler (www.metacrawler.com) use meta-search engines, which do not maintain databases. Instead, they send the search criteria to other search engines and aggregate the result. The search results appear as hyperlinks in a search window. Clicking a hyperlink in the search window loads the web page at that URL into the content window.
A Demo on Browsing the Internet using a Browser like Internet Explorer!
A Demo on Browsing the Internet using a Browser like Internet Explorer!
