Embed Size (px)
Citation preview
Copyright (c) 2003 by Prentice Hall. All rights reserved.
Understanding the Internet
CHAPTER ONEHow 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.
Copyright (c) 2003 by Prentice Hall. All rights reserved.
Common Uses of the Internet
Electronic Mail
Information Sharing and Resources
Business Communications
Advertising
Online Shopping
Stock Trading
Discussions and Chat
Entertainment
Program Downloads
Copyright (c) 2003 by Prentice Hall. All rights reserved.
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:
498 million (Neilsen/Net Ratings)
709.1 million (Neilsen/Net Ratings)
533 million (Computer Industry
Almanac)
945 million (Computer Industry
Almanac)
Copyright (c) 2003 by Prentice Hall. All rights reserved.
What is WWW?
The World Wide Web is a graphical
user-friendly interface
What is a URL? Click here to find
out!
Copyright (c) 2003 by Prentice Hall. All rights reserved.
http://www.pearsoneducation.com
Indicates the method the browser will use to
retrieve the page
Indicates the Web site location
Copyright (c) 2003 by Prentice Hall. All rights reserved.
How Can I Find the Internet?
A Web BrowserMicrosoft
Internet ExplorerNetscape
Navigator
Copyright (c) 2003 by Prentice Hall. All rights reserved.
Origins of the InternetAR
PANE
T MIL
NE
T
NSF
net
MCI
Mai
l and
Co
mpu
Serv
e
19
69 1
98
3 19
85 1
98
9
Copyright (c) 2003 by Prentice Hall. All rights reserved.
Protocols
Network Control Protocol (NCP)
Transmission Control Protocol (TCP)
Internet Protocol (IP)
Copyright (c) 2003 by Prentice Hall. All rights reserved.
Growth of the Internet
Copyright (c) 2003 by Prentice Hall. All rights reserved.
Backbone Key Points
Hubs
Switches
Router
Packets
ISP
PoP
Copyright (c) 2003 by Prentice Hall. All rights reserved.
How Information Travels
Local ISP
Regional Network
Interstate
Copyright (c) 2003 by Prentice Hall. All rights reserved.
The Impact of the InternetElectronic commerce and online
shoppingStock trading and financesCommunications Information sharingTelecommuting and home-based
businesses JobsEducationEntertainment and travel
Copyright (c) 2003 by Prentice Hall. All rights reserved.
Controversial Issues
Privacy
Free Speech
Government Control and Surveillance
Copyright (c) 2003 by Prentice Hall. All rights reserved.
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
Copyright (c) 2003 by Prentice Hall. All rights reserved.
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
Copyright (c) 2003 by Prentice Hall. All rights reserved.
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 man-made disaster.
Copyright (c) 2003 by Prentice Hall. All rights reserved.
Don’t Forget!
The Internet is used for a wide variety of taskse-mail,
online shopping,
stock trading,
sharing information,
real-time communications, and
job-related tasks
Copyright (c) 2003 by Prentice Hall. All rights reserved.
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?
