01.Introduction to Internet-1

By

Waruna Lakmal

What is Internet

“A communication network of computer networks which operates world-wide that exchanges data, news and opinions etc.”

It started with four interconnected computers in 1969 and was known as ARPANET (Advanced Research Projects Agency NET).

Today Internet connects every university, government, and research facilities in the world including many commercial sites.

What is Internet

The Internet;Is a source of informationIs a means of communicationIs a medium through which to conduct businessIs a source of getting funand many more…

History of the Internet

How did the Internet originate?

History of the Internet

Who controls the Internet? No onec—cit is a public, cooperative, and

independent network Several organizations set standards

Internet Usage

http://www.internetworldstats.com/stats.htm

http://www.internetworldstats.com/asia/lk.htm

http://en-us.nielsen.com/rankings/insights/rankings/internet

http://www.mit.edu/~mkgray/net/

Internet Growth Trends

1977: 111 hosts on Internet

1981: 213 hosts

1983: 562 hosts

1984: 1,000 hosts

1986: 5,000 hosts

1987: 10,000 hosts

1989: 100,000 hosts

1992: 1,000,000 hosts

2001: 150 – 175 million hosts

2002: over 200 million hosts

By 2010, about 80% of the planet will be on the Internet

No. of Participating Hosts Oct. ‘90 - Apr. ‘98

Domain Name Registration Jan. ‘89 - Jul. ‘97

April 2001: 31,000,000 Domain Names!!!

Growth of Internet Hosts *Sept. 1969 - Sept. 2002

0

50,000,000

100,000,000

150,000,000

200,000,000

250,000,000

Time Period

No

. of

Ho

sts

The Internet was not known as "The Internet" until January 1984, at which timethere were 1000 hosts that were all converted over to using TCP/IP.

Chart by William F. Slater, III

Sept. 1, 2002

Dot-Com Bust Begins

Copyright 2002, William F. Slater, III, Chicago, IL, USA

The Internet Host Count in Real-time on September 1, 2002 - Over 204,000,000 IP Hosts!!!

Chart showing Internet Growth from Sept. 1, 2001 to Sept. 1, 2002.

Source Netsizer.com

History of the Internet

Who controls the Internet?

World Wide Web Consortium (W3C) Oversees research, sets standards and guidelines

Mission is to contribute to the growth of the Web

Nearly 400 organizations around the world are members of the W3C

No onec—cit is a public, cooperative, andindependent network

Several organizations set standards

The Internet

What are some services found on the Internet?

1. Electronic Mail

2. WWW Service

3. Chat and Video conferencing

4. News Groups

5. File Transfer

etc

The World Wide Web

What is the World Wide Web (WWW)?

A worldwide collection of electronic documents

Each electronic document is called a Web page

Also called the Web

Can contain text, graphics, sound, video, and built-in connections

A Web site is a collection of related Web pages

The World Wide Web

What is a Web browser?

MicrosoftInternetExplorer

NetscapeFirefox

Program that allows you to view Web pages

Opera Safari

What are the features of web browsers?

GoogleChrome

The World Wide Web

What is a home page? The first page that a Web site presents Often provides connections to other Web pages

The World Wide Web

How do handheld computers and cellular telephones access the Web?

Use a micro browser that displays Web pages that contain mostly text

Must be Web-enabled

WAP/GPRS

The World Wide Web

What is downloading? The process of a computer receiving information Depending upon connection speed, downloading can

take from a few seconds to several minutes/hours

The World Wide Web

What is a URL?

Unique address for a Web pageA web server delivers the Web page to your computer

The World Wide Web

What is a hyperlink (link)?

Item found elsewhere on same Web page

Different Web page at same Web site

Web page at a different Web site

Built-in connection to another related Web page location

The World Wide Web

What is a search engine? Program used to find Web sites and Web pages by

entering words or phrases called search text Also called a keyword

Search Engine Usage

60%17%

13%

4%6%

Google Yahoo MSN AOL Others

Advocacy Blog WikiSocial

NetworkContent

AggregatorPersonal

Portal News InformationalBusiness/

MarketingEducational Entertainment

The World Wide Web

Basic types of Web sites?

The World Wide Web

Basic types of Web sites? Portal News Informational Business/marketing Educational Entertainment Advocacy Personal

The World Wide Web

What is a portal? A Web site that offers a variety of services from one,

convenient location, usually for free Searching, sports, e-mail,

news, weather, auctions, Web communities (Web sites that join people with similar interests)

Eg; www. Yahoo.com

www.wow.lk

The World Wide Web

What is a news Web site? Contains newsworthy material Stories and articles relating to current events, life,

money, sports, and weather

Eg: www.lankadeepa.lk

www.dailynews.lk

The World Wide Web

What is an informational Web site? Contains factual information Created by organizations and government agencies

The World Wide Web

What is a business/marketing Web site? Contains content that promotes products Allows you to purchase products or services online

Eg; www.sampath.lk

The World Wide Web

What is an educational Web site?

Some companies offer online training for employees

Some colleges offer online classes and degrees

Offers avenues for formal and informal teachingand learning

Source: www.howstuffworks.com

The World Wide Web

What is an entertainment Web site? Offers an interactive environment featuring music,

video, sports, games, and more

The World Wide Web

What is an advocacy Web site? Contains content that describes a cause, opinion,

or ideaEg; www.petition.com

The World Wide Web

What is a Web Blog?

A blog (a contraction of the term "Web log") is a Web site, usually maintained by an individual with regular entries of commentary, descriptions of events, or other material such as graphics or video. Entries are commonly displayed in reverse-chronological order. "Blog" can also be used as a verb, meaning to maintain or add content to a blog.

Many blogs provide commentary or news on a particular subject; others function as more personal online diaries.

The World Wide Web

What is a Content Agregator?

A content aggregator is an individual or organization that gathers Web content (and/or sometimes applications) from different online sources for reuse or resale.

The World Wide Web

What is a Wiki?

A wiki is a page or collection of Web pages designed to enable anyone who accesses it to contribute or modify content

The World Wide Web

What is a personal Web site? Web page maintained by private individual Reasons: sharing life experience with the world

or job hunting

What is HTML?

Hypertext Markup Language is the authoring software language used on the Internet's World Wide Web. HTML is used for creating World Wide Web pages

How do we create interactive multimedia web pages

No need to know HTML

Microsoft Word

Macromedia Dreamweaver  

Microsoft FrontPageetc... .

Q & A ?

Thank you…