INTRODUCTION To Internet Concepts & Using

ARPANET & INTERNET

• ARPANET was the network that became the basis for the Internet. Based on a concept first published in 1967, ARPANET was developed under the direction of the U.S. Advanced Research Projects Agency (ARPA).

• In 1969, the idea became a modest reality with the interconnection of four university computers. The initial purpose was to communicate with and share computer resources among mainly scientific users at the connected institutions.

Some Basic Internet Definition

• ARPANet - The precursor to the Internet.• ASCII - American Standard Code for Information

Interchange. The de facto world wide standard code for alphanumeric characters.

• Blacklist - Describes inappropriate advertisers on Usenet newsgroups and via junk E-mail.

• Browser - A program that is specifically used to look at various WWW resources.

• Client - Any computer that makes use of services available from other computers.

Some Basic Internet Definition

• Domain Name - A unique name that identifies an Internet site. The name always has two or more parts separated by a dot. The last part of the name identifies the site ( i.e. gov for government, edu for education, com for commercial, or net for network). An electronic street address.

• E-mail - Messages, usually text, sent from one person to another via a computer.

• Fire Wall - A combination of hardware and software that separates a LAN into two or more parts for security purposes.

Some Basic Internet Definition

• LAN - Local Area Network. Several computers located in the same physical location which are connected together in order to share information and services.

• Modem - A device that allows a computer to use a phone line to communicate with another computer.

• Protocol - The rules of conduct which enables a computer to communicate with another computer.PPP - A protocol that allows a computer to use a telephone line and a modem to make TCP/IP connections.

Some Basic Internet Definition

• Server - Any computer that makes services available to other computers.

• TCP/IP - Transmission Control Protocol/Internet Protocol. This is the protocol which defines the Internet.

• URL - Uniform Resource Locator. A unique name that identifies an Internet site.

• WWW - World Wide Web. The universe of hypertext servers.

Introduction To INTERNET

• What is the Internet?– The internet in simple terms is a network of the

interlinked computer networking worldwide, which is accessible to the general public. These interconnected computers work by transmitting data through a special type of packet switching which is known as the IP or the internet protocol.

Introduction To INTERNET

• What is the Internet?– The Internet, sometimes called simply "the Net,"

is a worldwide system of computer networks - a network of networks in which users at any one computer can, if they have permission, get information from any other computer (and sometimes talk directly to users at other computers).

THE INTERNET

What is the difference between the World Wide Web and the Internet?

• The World Wide Web (The Web) is only a portion of what makes up the internet, but it is the fastest growing part of the internet. The Web lets people, organizations and companies publish information for other people to see. This makes the Web a very useful tool for finding information on just about any topic.

• The Web is a large number of computer documents or "Web pages" that are stored on computers around the world and are connected to one another using hyperlinks. These Web pages can be seen by anyone through their computer's "Web Browser," which is the program you are using now.

Cont.

• A group of Web pages that follow the same theme and are connected together with hyperlinks is called a "Web site." Web sites and Web pages are written in a coding language that makes it possible to add pictures, sound and interactivity to plain old text, making people's reading experience more exciting.

Uses of Internet

• Internet has been the most useful technology of the modern times which helps us not only in our daily lives, but also our personal and professional lives developments. The internet helps us achieve this in several different ways.

• For the students and educational purposes the internet is widely used to gather information so as to do the research or add to the knowledge of any sort of subject they have. Even the business personals and the professions like doctors, access the internet to filter the necessary information for their use. The internet is therefore the largest encyclopaedia for everyone, in all age categories.

Internet in education

• Education these days has been the top priority for any family or individual person, and no doubt amongst the latest technologies to promote and maintain the education standards the internet comes first.

• Internet is not only an access to websites, these days there is knowledge and information on every aspect of the educational world over the internet. The resources provided on various web pages are indeed very informative and useful for professionals and students related to every field of work.

Effect of Internet on our daily lives

• The maximum effect of the internet is actually on the daily life of the individuals because indeed there is no aspect of life which is not influenced by the internet and its uses.

• Life has become drastically smooth and easy over the internet, while in the previous years seeking for a job required several visits to the offices and companies and interviews, these days all what is required is your detail resume emailed to the company's analysis division which assures you of any possibilities for getting the job instead of waiting and getting rejected in the end.

Effect of Internet on our daily lives

• Even in the minor daily life activities like traveling and planning is also related to the internet in some way or the other. Internet can now be used to inquire about the flight timings and delays which make it easier to plan for the departure time.

• The most interesting aspect of the internet influencing our daily lives is the factor of entertainment. Entertainment no longer demands your money or expense, today you can just log on the internet in your free time and get involved talking to people of similar interests, or watch movies or play games, its all there in the internet.

Types Of Networks

• There are three main types of internet networks which they are:

• LAN – Local Area Network.• MAN – Metropolitan Area Networks.• WAN – Wide Area Networks.

Local Area Networks

• Local area networks (LANs) are computer networks ranging in size from a few computers in a single office to hundreds or even thousands of devices spread across several buildings.

• They function to link computers together and provide shared access to printers, file servers, and other services.

Local Area Network

• LANs in turn may be plugged into larger networks, such as larger LANs or wide area networks (WANs), connecting many computers within an organization to each other and/or to the Internet.

• In summary, a LAN is a communications network which is:– local (i.e. one building or group of buildings) – controlled by one administrative authority – assumes other users of the LAN are trusted – usually high speed and is always shared

Local Area Network

Wide Area Network

• The term Wide Area Network (WAN) usually refers to a network which covers a large geographical area, and use communications circuits to connect the intermediate nodes.

Web Browsers

• Web browsers are programs used to explore the Internet. There are many Web browser programs available including Netscape Navigator, Internet Explorer and Opera. Internet Explorer is the Internet browser made by Microsoft and comes with Windows operating system.

Web Browsers

Search Engine