Transcript What is the Internet?

Understanding the Internet
CHAPTER ONE
How the Internet is Changing
the World
Copyright (c) 2003 by Prentice Hall. All rights reserved.
The Big Picture
The Internet is a
huge collection of
computers all
over the world
that are
connected in
various ways.
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Common Uses of the Internet
Electronic Mail
Information Sharing and
Resources
Business Communications
Advertising
Online Shopping
Stock Trading
Discussions and Chat
Entertainment
Program Downloads
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The Internet is an
Information Super
Highway
Copyright (c) 2003 by Prentice Hall. All rights reserved.
What is the Internet?
The Internet is a
huge network
comprised of
millions of
computers
worldwide.
It is set up with
clients and servers.
Copyright (c) 2003 by Prentice Hall. All rights reserved.
Who Has Internet Access?
Worldwide Internet
Population Unique
Users
(2001 estimates):
Projection for 2004:
709.1 million
498 million
(Neilsen/Net Ratings) (Neilsen/Net Ratings)
533 million
(Computer Industry
Almanac)
945 million
(Computer Industry
Almanac)
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What
What is a URL?is WWW?
Click here to find
out!
The World Wide
Web is a graphical
user-friendly
interface
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Indicates the method
the browser will use to
retrieve the page
http://www.pearsoneducation.com
Indicates the Web
site location
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How Can I Find the Internet?
 A Web Browser
Microsoft
Internet
Explorer
Netscape
Navigator
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1989
1985
1983
1969
Origins of the Internet
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Protocols
Network Control Protocol (NCP)
Transmission Control Protocol
(TCP)
Internet Protocol (IP)
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Growth of the Internet
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Backbone Key Points
 Hubs
 Switches
 Router
 Packets
 ISP
 PoP
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How Information Travels
Local ISP
Regional
Network
Interstate
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The Impact of the Internet
 Electronic commerce and online
shopping
 Stock trading and finances
 Communications
 Information sharing
 Telecommuting and home-based
businesses
 Jobs
 Education
 Entertainment and travel
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Controversial Issues
Privacy
Free Speech
Government Control and
Surveillance
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Internet Technologies and Trends
 Greater concerns over securing
data, maintaining privacy, and
fighting cybercriminals
 More universal access to the
Internet
 An increasing number of people
using high speed (broadband)
Internet access
 More fiber optic cable and other
cutting-edge technologies
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Internet Technologies and Trends
 Increased use of wireless
devices and personal digital
assistants (PDAs)
 Greater government control
over Internet content
 Increased electronic
surveillance by government
 The use of biometrics
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Don’t Forget!
The Internet has a colorful and
interesting background.
began as a way for the
Department of Defense to
communicate remotely
mushroomed into a gigantic
conglomeration of networks
which span the world
Copyright (c) 2003 by Prentice Hall. All rights reserved.
Don’t Forget!
 The supporting structure for
the Internet is not controlled
by any one organization.
 Decentralization is intentional so
communication can continue
even if part of the Internet is
destroyed by a natural or manmade disaster.
Copyright (c) 2003 by Prentice Hall. All rights reserved.
Don’t Forget!
 The Internet is used for a wide
variety of tasks
 e-mail,
 online shopping,
 stock trading,
 sharing information,
 real-time communications, and
 job-related tasks
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Don’t Forget!
 The Internet, by its very nature and
strategic position, raises issues and
concerns such as
 privacy,
 security,
 freedom of speech, and
 government control and monitoring
 As new technologies emerge and
more people begin to use the
Internet, issues will become more
prominent.
Copyright (c) 2003 by Prentice Hall. All rights reserved.
Questions?
Copyright (c) 2003 by Prentice Hall. All rights reserved.