The World Wide Web Uinternet Explorer

Web browser

n Program that allows you to view Web pages uNetscape The World Wide Web uInternet Explorer

Part I: Exploring the Web

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How can you establish a connection and start the Web browser? How do handheld computers and Step 1 cellular telephones access the Web?

Step 2 n Must be Web-enabled Microbrowserfor a 1:Click the Web Web-enabled browser n Uses a microbrowser cellular telephone program name Web that displays Web browser 2:If necessary, program pages that contain connect to name mostly text Internet 3:Connection to the Internet occurs and a home page displays

Step 3 Microbrowserfor a Web- A106 © Peter Lo 2002 3 A106 © Peter Lo 2002 enabled handheld computer 4

1 How can you identify a hyperlink Hyperlink (link) on a Web page? n Text or graphic that displays a related Web page n Mouse pointer changes to a small hand when you n Also called a link point to a link n Click the link to display the associated Web page n Link can be a word, phrase, or image

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How do you recognize links? What can links display? 1. Some links display a different color n Item found elsewhere on same Web page when you point n Different Web page at same Web site to them 2. Some links n Web page at a different Web site are underlined 3. Some links are graphical images 1. link 2. link

3. link

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2 Search engine What is a hit? n Any Web page name that lists as the result of a search n Program used to find Web pages pertaining to a specific topic Google search engine 97 hits

Search text Spider Word or phrase Program used by entered in search search engines to find engine’s text box Web pages that contain search text hit Also called a keyword Also called a crawler A106 © Peter Lo 2002 or bot 9 A106 © Peter Lo 2002 10

Some widely used search engines Directory

n Search tool with organized set of topics and subtopics n Lets you find information by clicking links rather than entering keywords organized topics from which you select

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3 Six basic types of Web pages Portal Web page

n Offers a variety of Internet services from a single, Business/ convenient location Yahoo! is Advocacy Informational a portal marketing n Often called a portal

News Portal Personal

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News Web page Business/marketing Web page

n Contains newsworthy material n Contains content that promotes products n Stories and articles relating to current events, life, money, n Allows you to purchase products online sports, and weather ESPN.com is a sports news page

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4 Advocacy Web page Personal Web page

n Contains content that describes a cause, opinion, or idea n Web page maintained by private individual n Reasons: sharing life experience with the world

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What services are often found on a Web community portal? n Web site joining specific group of people Search E-mail engine with similar interests or relationships Sports and Newsgroups weather Stock Local , quotes or message national, and Instant boards worldwide messaging Newsgroup news Reference or message tools Maps board E-mail Online Free Chat rooms photo personal Calendars Chat Web pages Shopping albums room malls and auctions A106 © Peter Lo 2002 19 A106 © Peter Lo 2002 20

5 What is multimedia? Graphic file formats

n Application integrating text with other media elements n Often used on Web pages to add appeal

Audio Animation

Virtual Graphics reality Video

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Thumbnail Animation n Small version of a larger n Appearance of motion created by displaying a series of still graphical image images in rapid sequence n Usually click thumbnail on Web page to display full-sized image

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6 Audio MP3 files MP 3 player n Music, speech, or any other sound n Compresses audio to plays music one-tenth of original stored on CD n Individual sound files that you download to your size while preserving computer quality of sound n Allows for transfer of music over Web

MP 3 player plays music

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Streaming audio Video

n Enables you to listen n Consists of full-motion images with sound played back at to the sound as it RealAudio various speeds downloads to your n MPEG is popular video compression standard computer streaming video n Radio stations use streaming audio to broadcast over the Web RealAudio link radio station Web page A106 © Peter Lo 2002 27 A106 © Peter Lo 2002 28

7 Web cam Virtual reality (VR)

n Combined video camera and software that outputs video to n Use of computers to simulate real or imagined a Web page environment n Used for games and many practical applications

Web cam video display

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Webcasting File Transfer Protocol (FTP)

n Delivers information via the Web at regular intervals n Internet standard that allows you to upload and without user making a request download files with other computers on Internet n Also called push technology

real-time sporting event scores pushed to desktop from SportsLine.com Web site

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8 Newsgroup Message board

n Online area where users conduct written discussions about n Type of discussion group that does not require newsreader particular subject n Also called a discussion board n User sends message to newsgroup n Other users in newsgroup read and reply to message

Usenet Entire collection of Internet newsgroups News server Computer that stores and distributes newsgroup messages A106 © Peter Lo 2002 33 A106 © Peter Lo 2002 link to message about 34 financial issues

Chat Instant messaging (IM)

n Real-time conversation that takes place on a computer n A real-time n Chat room is location on server that permits users to Internet discuss topics of interest communications service

Marianne’s message immediately displays on Jeff’s computer screen because she is online

9 FAQ page Netiquette

n Frequently Asked Questions n Code of acceptable n Often available on a Web site that provides behaviors users Golden Rule: updates should follow Treat others as while on the Internet you would like them to treat you.

Web application Web-based training (WBT)

n A software application that exists on a Web site, such as n Self-directed, self-paced instruction on a topic on the Web maps and directions n Distance learning (DL) is the delivery of education at one n Some Web applications store your data and information at location while the learning takes place at other locations their site n Some are free

10 Application service provider (ASP)

n Third party organization that manages and distributes software and services on the Web n Allows companies to outsource information technology (IT) The World Wide Web needs

Part II: Creating a Web Page

Step 1 Web publishing Step 2 How do you deploy a Web site?

n Development and maintenance of Web Step 3 pages 1 Plan Upload, or Locate Web copy, site to 2 Analyze and design server to store 3 Create the Web site Web server your site 4 Deploy the Web site Step 4 5 Maintain the Web site

Step 5

11 Reference n Computers in Your Future (Ch. 8) n Introduction to Computing (Ch. 2) n The Better Way (Ch. 13, 15) n Discovering Computers World 2003 (Ch. 2 – 3)