Transcript Understanding Computers, Chapter 8

Imagine sitting at your desk at work
and using a Web browser to view live
pictures of every room in your house.
You see the plumber or the
electrician walking down your
driveway. You unlock the front door
using a few keystrokes on your office
PC.
With a few more keystrokes, you adjust
your home's temperature and turn on the
lights in one of the bedrooms.
Just then, an e-mail message arrives from
your refrigerator. The appliance reminds
you that you are out of milk and orange
juice and asks you if you want to
automatically order more through an
online grocer, such as Vons.
Imagine that later that day, you get home and
sit in front of the television. The giant screen is
divided into four quadrants.
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In one quadrant there is a Web browser opened to
eBay's home page.
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In another quadrant is a feature movie, available on
demand, that is being streamed to your television at
10 megabits per second.
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In a third part of the screen is a Web camera view of
your child's room so you can keep track of what he's
currently destroying.
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In the fourth panel is the e-mail that has arrived for
you today.
Having these capabilities at home may
sound like something from a James Bond
movie or the Jetsons.
All of these wired features and many
more will be available by the end of next
year and can be built into a home for less
than the cost of a German luxury car.
The Internet and the World Wide
Web
Chapter 8
What is the Internet?
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Internet:
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WORLDS LARGEST NETWORK
Made up of small networks hooked together
Links millions of computers all over the world
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What the Internet is used for
Browsing/surfing
1.
a.
Communicating
2.
a.
b.
c.
d.
e.
f.
a.
b.
Ecommerce
Auctions
Personal Finances
4.
a.
b.
c.
6.
Email
Messaging (IM, Text)
Twittering
VoiP - Skype
Conferencing/NetMeetings
Social Networking
Shopping
3.
5.
Searching for information
Bill Pay
Banking
Investing
Entertainment
Cloud storage and SaaS
Myths About the Internet
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Myth 1: The Internet is free
Myth 2: Someone controls the Internet
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No single group or organization controls the
Internet
Governments can regulate Internet use
within its country, but difficult to enforce
Myth 3: The Internet and World Wide
Web are identical
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Internet = physical network
WWW = one resource (Web pages)
available via the Internet
Other resources are available via the
Internet (email, VoiP, texting, etc..)
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The Internet Community Today
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Users
Internet service providers (ISPs):
Internet content providers:
Provide access to the Internet
Hardware and software companies
Government – some countries limit access; FCC influences access
Other organizations
Internet Society (ISOC): Addresses issues impacting the future of the internet
 Internet Corporation for Assigned Names and Numbers (ICANN): Domain and
IP management
 World Wide Web Consortium (W3C): Protocols and standards, ensures
interoperability
 Application service providers (ASPs): Companies that manage and distribute
software based services (SaaS)
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Infrastructure companies: Own or operate the physical structure of the
Internet
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The Internet Timeline
Internet 2: a consortium of researchers, educators, and technology leaders from industry, government,
and the international community that is dedicated to the development of revolutionary Internet
technologies
#1 use of the internet is
“Surfing”
using search engine
Search engine is a web site specifically designed to locate
Web pages that match specified keywords or selected
categories or phrases
• Many search sites available (Google, Bing, Yahoo, etc.)
Why do we surf?
• Looking for web sites that contain the material you are
seeking
Effective Internet searching: A very important skill
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Keyword search
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Keywords are typed in a search box to locate information on the
Internet
Matching Web pages are called hits
Clicking on a Web page name displays that page
Phrase searching (more than one keyword)
Many search sites contain additional tools
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Calculators
Dictionaries
Telephone numbers
Weather
Time
Stock Quotes
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Evaluating Search Results
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Don’t be too quick to click!
Evaluate search results:
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The first result may be a sponsored ad
Check out each link
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Does the title and listed description sound appropriate for the
information you are seeking?
Is the URL from an appropriate company or organization?
Check The date
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Many online articles are years old
Verify online information with a second source
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Other Issues we are faced with
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Censorship issues
Privacy of Web activities
Spyware
Adware
Email privacy - encryption isn’t enough