Reading Material: Data communication
Competency 3 Uses the internet efficiently and effectively to access and communicate information
Competency Level 3.1 : Uses the Internet to access relevant information
Duration : Two periods
Learning Outcomes:
• Names components required to access the Internet.
• Accepts that the Internet can be used to search for information.
• Uses web browsers & search engines to search for information.
• Searches for information using the Internet.
• Downloads information using the Internet. Learning – Teaching Process:
Engagement:
• Get two volunteers to present the following dialogue.
Dialogue
Amal : Hello, Nimal, where you going?Nimal : I’m going to the school to look for my results. Aren’t you?
Amal : Haven’t you got your results yet? I knew my results the evening before yesterday.
Nimal : How come? The school receives the results by post, this morning. Doesn’t it? Amal : Nimal… Didn’t you listen to the evening news the day before yesterday? And it was announced that the results would be carried on the web site at mid-night, ` the same day.
Nimal : Then how about yours? Amal : I’ve got 10 A s.
Nimal : Congratulations. Didn’t you phone your dad and tell him about your performance?.
Amal : Madness, why should I spend so much to make a phone call? No sooner than I knew my results, I sent an Email to my dad. But, before he went through my
40 Nimal : How did that happen?
Amal : As a habit, dad used to read the ‘Daily News’ on the Internet. He has seen that the results would be carried on the web site of the Examination Department. He has got my Index number. from mum over the phone when he spoke to mum that day.
Nimal : Lucky I met you Amal. I didn’t know all these things. I was waiting until it came to school by post.
Amal : Let’s go to our place. I could go through the web site and watch yours’ too. Not only that, I can down load it and get a print out. Then I can show it to the rest at home.
• • •
• • Conduct a discussion to highlight the following:
• The Internet is the largest network in the world.
• The Internet helps you to locate information.
• The Internet can be used for various tasks.
• To access Internet in your home the following will be needed.
o A computer
o A telephone line and a modem/CDMA phone / equivalent wireless devices
o Internet Service Provider (ISP)
o Web Browser
• Or mobile phone with Internet facility Instructions suggested for Learning:
Let’s go through the Internet.
•
Search information on the Internet related to the following four topics. o Future computerso Free and Open Source Software o Tele-Medicine
o Employment opportunities
• Go through the reading material to acquaint yourself with the Internet related topics.
• Identify the services of the Internet.
• List the services associated with the Internet.
• Describe the services listed.
• Get hand on experience on surfing the Internet by using a popular web browser
• Conduct the discussion to identify how you can explain the services in relation to web addresses and search engines.
Points to clarify subject matter
:
•
Get each group to present its findings.•
Request the presenters themselves to fill in any gaps they have left.•
Encourage the other groups to submit constructive comments.•
Fill-in any gaps indicated.•
Conduct a discussion to highlight the following:o No person, government or entity owns or controls the Internet.
o Internet renders various services such as E-mail
World wide Web (WWW) File Transfer Facility
o A web browser is a software application, which is used to surf the web.
o Popular web browsers are Internet Explorer and Mozilla Firefox.
o Each web site has a unique web address.
o Search engines help users to find web pages on a given subject.
o Can search for information using search engines.
Reading Material What is Internet?
The Internet is a massive network of computer networks, a networking infrastructure. It connects millions of computers together globally, forming a network in which any computer can communicate with any other computer as long as they are both connected to the Internet. Information that travels over the Internet does so via a variety of languages known as protocols. The Internet consists of millions of smaller domestic, academic, business, and government networks, which together carry various information and services, such as electronic mail, online chat, file transfer, and the interlinked Web pages and other documents of the World Wide Web
World Wide Web:
The World Wide Web (WWW), or simply Web, is a way of accessing information over the medium of the Internet. It is an information-sharing model that is built on top of the Internet. The Web uses the Hyper Text Transfer Protocol (HTTP), only one of the languages spoken over the Internet, to transmit data. The WWW also utilizes browsers, such as Internet Exploreror or Mozilla Firefox, to access web documents called web pages that are linked to each other via hyperlinks. Web documents also contain graphics, sounds, text and video.
Web sites and Web Pages:
o A site (location) on the World Wide Web.
o Each web site contains a home page, which is the first document users see when they enter the site.
o A web site is a collection of web pages, which are documents coded in HTML that are linked to each other and very often to pages on other web sites.
42 Web Browser: