our digital world chapter 2 the internet: gateway to a world of resources © paradigm publishing,...
TRANSCRIPT
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Our Digital World
Chapter 2
The Internet: Gateway to a World of Resources
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This chapter will help you understand:
• How the Internet and Web have changed the ways people interact with each other.
• Services, equipment, and software used to connect and browse the Internet.
• Browsing and searching online.• Evaluating the accuracy of the content you find.• Intellectual property and copyright laws.• Various Internet services and applications.
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Main Topics• 2.1 The World Goes Online• 2.2 What Are the Internet and Worldwide Web
?• 2.3 Joining the Digital World• 2.4 Navigating and Searching the Web• 2.5 The Vast Sea of Online Content• 2.6 E-Commerce• 2.7 Connecting in Cyberspace
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Why Should You Care?
• 49% of public used the Internet to track the 2009 outbreak of H1N1 (swine) flu.*
• 55% of adults went online to follow the 2008 U.S. presidential campaign.**
• 80% of students surveyed “anticipate running into new technology they will have to adapt to and learn upon entering the workforce.”
*(Pew Internet & American Life Project)
**(Study by IBM)
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2.1 The World Goes Online
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What the Internet Makes Possible Today
• Scientists share expensive equipment online.• Doctors and pilots learn by using computer
simulations.• iPhones as boarding passes.
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What Does the Future Hold?
• The Internet in space as astronauts begin to Tweet.
• Collaborative emails with rich multimedia content.
• Nanorobots transmitting data from within your body.
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2.2 What Are the Internet and the Worldwide Web?
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What Is the Internet?
The physical infrastructure that allows us to connect and store content.
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The Infrastructure of the Internet
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What Is the Web?• A system of content that resides on Internet
servers.• Web 2.0 involves interaction of users with
content.• Web 3.0 (Semantic Web) involves integrating
data from various sources in a meaningful way.
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Computers in Your Career
• One development of Web 3.0 is Travel 3.0 intelligent agents.
• Agents search across multiple sites to gather travel information more efficiently.
• They “read” travel reviews to craft an itinerary.
• They “understand” consumer preferences and search accordingly.
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• Use care when sharing personal information online.
• You wouldn’t shout your home address and social security number from a street corner. Why would you post it online for the world to read?
Playing It Safe
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Web-enabled Careers
• Not all jobs involving the Internet are high-tech. – Web content writer/provider– Internet law expert– online trainer
• A variety of developer jobs include:– programming an e-commerce shopping cart– creating environments in virtual reality worlds
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• Internet• Web (World Wide Web or WWW)• web page• website• Web 2.0• Web 3.0• Semantic Web
Terms to know
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Ask Yourself…While the Internet is the infrastructure on which content is delivered, the Web is
a. what makes email possible.
b. a system of content.
c. a set of servers that host online content.
d. a system of sites.
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2.3 Joining the Digital World
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Worldwide Internet Use
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Getting Online
• Types of Internet broadband connections include:– DSL– Cable– Satellite
• Hardware to connect.• Wired or wireless connections.
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Connecting to the Internet
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Internet Service Providers
• An Internet Service Provider (ISP) allows you to access the Internet.
• ISPs include phone companies, cable and satellite companies, and local providers.
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Browsers
• Used to navigate online content.• Translate content.• Display text, graphics, and multimedia
content.• Examples include Mozilla Firefox, Internet
Explorer, Google Chrome, and Safari.
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Browser Features: Mozilla Firefox
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• Internet Service Provider (ISP)• browser• download• upload
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Ask Yourself…What are three kinds of broadband connection?
a. DSL, cable, and satellite
b. DSL, mobile, and dial-up
c. fiber-optic, DSL modem, and WiMax
d. ISP, Wi-Fi, and router
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2.4 Navigating and Searching the Web
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Getting around the Internet
• Internet Protocol (IP): series of numbers that uniquely identifies an Internet location.
• Uniform Resource Locator (URL): text address entered in a browser to go to a website.
• URL is cross-referenced to an IP address.
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Parts of a URL
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Navigating among Web Pages
• Hyperlinks identify a Web destination.• Hyperlinks can be embedded in any graphical
object or text.
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Parts of a Web Page
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Search Engines
• Search engines are websites in which you enter search terms (keywords) to find Web content.
• Examples: Google, Yahoo!, Ask, or Bing.• Search directories catalog results.• Metasearch engines search across various sites
at the same time.
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Search Tips
• Understand keywords and keyword phrases.• Learn to narrow your search for better results.• Exclude certain results.• Use specialized search engines.
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• Most people don’t realize how much information about them exists online. ─ Resume─ Blog entries on a publicly viewable page─ Schools, employers, friends, or the
government placed your information online• Do a web search of your name to see what’s
online about you.
Playing It Safe
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Plug-ins and Players
• Some websites may require a plug-in or player to display content.
• Plug-ins and players are free.
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Plug-ins and PlayersName Purpose
Adobe Reader Read and print PDF files
Adobe Flash Player Play animations
Quicktime Play MP3 music, animations, and video files
RealPlayer Play streaming audio and video files
Shockwave Play interactive games and various multimedia files online
Windows Media Player Play streaming audio, video, animations and multimedia presentations on the Web
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• Download plug-ins and players from the source.
• Avoid spyware.
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• Internet protocol (IP)• uniform resource
locator (URL)• web address• domain name• top-level domain
(TLD)• hyperlink• hypertext
• home page• search engine• search directory• keywords• metasearch engine• plug-in• player• streaming video
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Ask Yourself…
Search engines search for content. What do search directories also do?
a. download results to your hard drive
b. provide a catalog of sites by topic
c. sort results alphabetically
d. only deliver the top ten results
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2.5 The Vast Sea of Online Content
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Judging the Quality of Online Content
• Who, what, when?– Who published the content?– What is the quality of the content?– When was it published?
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The Three W’s of Online Content
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Copyright and Intellectual Property• It’s illegal to copy intellectual or copyrighted
property.• Ease of copying and pasting content online
leads to violations.• Peer-to-peer file sharing issues.• Digital Millennium Copyright Act.
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The Invisible Web
• Invisible Web (Deep Web) includes hidden or uncataloged databases.
• Most search engines can’t find this content.
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• Online research resources: online encyclopedias, survey results, online professional journals.
• Many careers rely on using the Internet for research: – Librarians– Government policy analysts– Economists– Insurance risk analysts– Human resource workers – Purchasing agents, and others
Research
Computers in Your Career
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• copyright• intellectual property• peer-to-peer (P2P) file sharing• deep Web• invisible Web• crawler• data integration
Terms to Know
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Ask Yourself…What makes copyright infringement so easy online?
a. the ease with which you can copy and paste content
b. the lack of copyright laws
c. the lack of an online police force
d. None of the above
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2.6 E-Commerce
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What Is E-commerce?
• Buying, selling, or bidding online.• Three kinds:– Business-to-Business (B2B)– Business-to-Consumer (B2C)– Consumer-to-Consumer (C2C)
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The B2C E-commerce Process
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Classified and Auction Sites• Never pay by check or debit card.• Never let the buyer come to your
home.Playing It Safe
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E-commerce
• Online entrepreneurs start their own eBay store or website.
• Affiliates or associates get a small fee for sending online browsers to a partner site.
• Supplement regular job or as a main source of income.
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The Future of Online Advertising
• What would be the consequence of the collapse of the Internet’s advertising business model?
• Would Internet users be willing to pay for content that had been free?
• What are the best ways to make money from content, aside from advertising?
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• e-commerce• business-to-business (B2B) e-commerce• business-to-consumer (B2C) e-commerce• consumer-to-consumer (C2C) e-commerce
Terms to Know
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Ask Yourself…
Which is an example of a C2C e-commerce site?a. Amazon
b. Microsoft
c. Craig’s List
d. U.S. Steel
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2.7 Connecting in Cyberspace
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Ways to Connect Online
• Email to send and receive messages and attached files.
• Voice-over Internet Protocol (VoIP) to make phone calls over the Internet.
• Web conferencing to hold meetings and collaborate online.
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• Email can deliver viruses to your computer.
• Phishing involves email that delivers financial scams.
Playing It Safe
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• email• email program• email client• email address• Voice-over Internet Protocol (VoIP)• web conferencing• Multipurpose Internet Mail Extensions (MIME) format• Simple Mail Transfer Protocol (SMTP)• Internet Message Access Protocol (IMAP)• Post Office Protocol, Version 3 (POP3)
Terms to Know
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Ask Yourself…
When was the first email sent?a. 1985
b. 1990
c. 1961
d. 1971
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Our Digital World
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