InternetInternet iis a huge network of s a huge network of computers around the world that computers around the world that are linked together to exchange are linked together to exchange and share information.and share information.

Computers in internet are linked Computers in internet are linked up with other computer worldwide up with other computer worldwide by means of telephone wires, by means of telephone wires, cables and satellites.cables and satellites.

Things Needed to Access the Internet

• Computer

• Programs

• Modem

• Telephone Line or ISDN Line

• Internet Service Provider (ISP)

Why is Internet Helpful to Why is Internet Helpful to Many People?Many People?

• It is one of the best communication tools.• You can send and receive electronic messages (e-mail)

to and from other people very quickly.• You can chat with other people and even see them live

on screen.• You can post your opinions regarding a certain topic in

forums online or newsgroups discussion.• It contains vast amount of information that you

need.– You can reach practically on any topic that you need in school,

business or in other fields.– You can get picture, graphics and sounds that you may use for

your presentation.

• It gives business opportunities.– You can promote your business and products world

wide.– You can buy things on the internet and have then

delivered to your house.

• It helps people to maximize and save time than do it in an ordinary way.– You can inquire for your billing of payment online.– You can reserve for hotel accommodation or air flight.

Disadvantages of the InternetDisadvantages of the Internet

• Personal Information• Since we do not see who the other person is on the other side of the

computer, any one can claim to be someone they are not.• Pornography• There are thousands of pornographic sites on the Internet that can

be easily found and can be detriment in letting children use the Internet.

• Spamming• This refers to sending unsolicited e-mails in bulk, which serve no

purpose and unnecessarily clog up the entire system.• Virus Threat• Computers attach to Internet are more prone to virus attacks and

they may end up crashing your whole hard disk, causing you considerable headache.

Who Owns the InternetWho Owns the Internet

No organization, corporation or government owns or runs the internet. Instead may people and organizations voluntarily participate in task force groups who meet to develop standards for the many various technical needs or running the internet. Decisions are made by consensus among all who choose to participate.

World Wide Web (WWW)World Wide Web (WWW)

• -is a hypertext-based, distributed information system in which users may create, edit, and browse hypertext documents. Also called W3 or simply “the web “, it is a collection of electronic documents that are linked together.

WebsiteWebsite

-is a site or area on the World Wide Web that is accessed through its own internet address.

- an example of a Website Address is http:\\www.google.com

Classifications of Web SitesClassifications of Web Sites

• Portal

A portal is a web site that offers a variety of Internet services from a single, convenient location. Most portals offer the following free services: search engine, sports, and weather, free web publishing services and e-mail, and other forms of communications. Popular portals include AltaVista, HotBot, Lycos, and Yahoo!.

News

• A news web site contains stories and articles on current events, life, money, and sports.

Informational

• An informational web site contains factual information. Many government agencies have informational web sites providing information such as population data and other statistics.

EducationalEducational

An educational web site offers exciting and challenging avenues for formal and informal teaching and learning. On the web, you can learn how airplanes fly or how to construct a simple machine. Teachers sometimes enhance classroom teaching by publishing materials, grades, and other class information through the Internet.

Business

• A business web site contains content that promotes or sells products or services. Nearly every business has web site. Many of these companies also allow you to purchase their products or services online.

Entertainment

An entertainment web site offers an interactive and engaging environment. Popular entertainment web sites offer music, videos, sports, games, and more.

Advocacy• An advocacy web site contains content that

describes a cause, opinion, or idea. The purpose of an advocacy web site is to convince the reader to support the cause, opinion, or idea. These web sites usually present views of a particular group or association.

Personal• A private individual or family may maintain a

personal web site or just a single web page. People publish personal web pages for a variety of reasons.

HOW TO EVALUATE A HOW TO EVALUATE A WEBSITEWEBSITE

• Author: What’s in a name?

Who made the site? Anyone can make a website and lie about their true identity. You have to know something about the people and organization that made the site. Is the author’s name clearly visible/ is the author a well-known scholar in the field? Does the author have appropriate credentials to create the page? Is the author affiliated with an academic institution?

• Date: When was it last updated? When was the website posted? When the

website was last updated? How often is it updated? Are the links active? Check for a ‘last updated’ date near the top or bottom of the site’s home pager. If it has been updated recently, it means someone is maintaining the site, making sure the links still work and the information are updated.

Content: How accurate is the information

• Is the information complete, consistent, and valid? Does it confirm or contradict what you already know about the topic? How does it compare with other information you have found? Can you compare it to another resource? Does the information appear thoughtfully done, or done in haste?

Purpose: Why Does The Page Exist?

Is the purpose of the site to inform, persuade, explain, or sell something? How broad and how deep is the information? Does this site address the topic you are researching? Was the page worth visiting? Does the site offer anything informative, unique, or insightful?

Audience: Is The Site Right For You?

Was the site intended for experts or beginners? Do you find much jargon? Is the information relevant to your needs and purpose?

Format and Appearance: Is the site well organized and user friendly?

Are the graphics clear in intent, relevant and professional looking? Do the graphics add to enhance the content? Is there a way to search the site? Is there a fee to access the information? Do you receive full text or summaries of articles? Is there a “text only” options?

Objectivity: What is the author’s point of view?

Do you see evidences of fairness and balance, or do you see bias? (Bias can be detected by finding misleading or exaggerated statements). Are there one-sided arguments about controversial issues?

Privacy: What is the sites policy?

If any personal information is requested from you, what does the site do to protect your privacy? Does the site tells you its privacy policy?

Web PageWeb Page

- is one area on the World Wide Web; it is comparable to a page in a book. It is the basic unit of every website and it can be an article or an ordering page, and is usually a combination of text and graphics.

Home PageHome Page

- is the Web page that your browser uses when it starts. It is also the Web page that appears every time you open your browser.

Web BrowserWeb Browser

- a program that allows you to surf the internet. It uses a graphical approach to find and display information.

TWO WAYS OF FINDING TWO WAYS OF FINDING INFORMATION ON THE WEBINFORMATION ON THE WEB

1.Using a SEARCH ENGINE• Search engine- is an Internet tool that locates

information and sorts them according to the specified keywords. It is also a website that helps you find information in other websites.

• Examples of search engines are the following:a.Yahoob.Googlec. Alta Vistad. Lycos

2.Using SEARCH KEYWORDS

Search Keywords- used to locate

highly relevant information that would

match the topic entered.

HyperlinksHyperlinksAlso known as hot links are texts or Also known as hot links are texts or

images that connect you to another webpage images that connect you to another webpage containing additional information. Hyperlinks containing additional information. Hyperlinks are usually activated by clicking the mouse are usually activated by clicking the mouse pointer on the text or image itself. This links pointer on the text or image itself. This links provide a connection between web pages, provide a connection between web pages,

allowing for easy access to other web pages.allowing for easy access to other web pages.