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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• 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.
Computers in Your Career
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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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•
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•
Terms to know
Internet
Web (World Wide Web or WWW)
web page
website
Web 2.0
Web 3.0
Semantic Web
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Ask Yourself…
While the Internet is the infrastructure on which
content is delivered, the Web is
a.
b.
c.
d.
what makes email possible.
a system of content.
a set of servers that host online content.
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.
b.
c.
d.
DSL, cable, and satellite
DSL, mobile, and dial-up
fiber-optic, DSL modem, and WiMax
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 Playing
a publicly
viewable page
It Safe
─ Schools, employers, friends, or the
government placed your information online
• Do a web search of your name to see what’s
online about you.
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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 Players
Name
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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Research
• 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
Computers in Your Career
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•
•
•
•
copyright
intellectual property
peer-to-peer (P2P) file sharing
deep Web
invisible Web
crawler
data integration
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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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Terms to Know
•
•
•
•
e-commerce
business-to-business (B2B) e-commerce
business-to-consumer (B2C) e-commerce
consumer-to-consumer (C2C) e-commerce
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Ask Yourself…
Which is an example of a C2C e-commerce site?
a.
b.
c.
d.
Amazon
Microsoft
Craig’s List
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.
b.
c.
d.
1985
1990
1961
1971
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Our Digital World
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