Transcript Computing Essentials 2012

Chapter 02: The Internet, ISP &
Working of Internet
© 2012 The McGraw-Hill Companies, Inc. All rights reserved.
Computing Essentials 2012: Making IT Work for You
The Internet and the Web
• The Internet is the largest global network,
connecting smaller networks worldwide
• The Internet was launched in 1969
– National computer network
– US funded project called ARPANET
• The World Wide Web or WWW was introduced in
1991 at USA
• Father of WWW-Tim Burners Lee
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Computing Essentials 2012: Making IT Work for You
Model of Internet
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Working of Internet
Computing Essentials 2012: Making IT Work for You
Router A
Router B
ISP
fiber optic
lines
www.google.com
ISP:
Internet Service
Provider
Router C
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Computing Essentials 2012: Making IT Work for You
The Internet and How We Connect to It Using
an ISP
• Explain what the Internet is
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Computing Essentials 2012: Making IT Work for You
The Internet and How We Connect to It Using
an ISP
• Define an Internet Service Provider and its
purpose
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Computing Essentials 2012: Making IT Work for You
The Internet and How We Connect to It Using
an ISP
• Describe how you connect to the Internet
through the ISP and the ISP’s relationship to
the Internet
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Computing Essentials 2012: Making IT Work for You
The Internet and How We Connect to It Using
an ISP
• Identify and describe the different
connection options that ISPs can provide
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Computing Essentials 2012: Making IT Work for You
The Internet and How We Connect to It Using
an ISP
• Identify and describe the levels of service
offered by an ISP
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Computing Essentials 2012: Making IT Work for You
How Information is Sent When Using an ISP
• Define and explain that the most important
protocol of the Internet is the Internet Protocol
(IP).
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Computing Essentials 2012: Making IT Work for You
Common Internet Uses
1. Communication
Exchange e-mail
Discussion groups
2. Online Shopping
3. Searching
Virtual libraries
4. Entertainment
5. Education or e-learning
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Computing Essentials 2012: Making IT Work for You
Access- ISP
• Common way to access the Internet is through a
Commercial Internet Service Providers (ISP)
– National Service Providers
– Wireless service providers
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Computing Essentials 2012: Making IT Work for You
Browsers
• Programs that provide access to Web resources
• Allow you to surf the Internet
• Popular Web browsers include:
– Mozilla Firefox
– Apple Safari
– Microsoft Internet Explorer
– Google Chrome
– Opera
• Address or location of the
resource must be specified
– URL
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Computing Essentials 2012: Making IT Work for You
URLs
• Uniform Resource Locators
– All URLs have at least two parts
• Protocol
• Domain name
• Top-level domains (TLDs) provide further
information about the website
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Computing Essentials 2012: Making IT Work for You
This address is for an
Internet server that uses
The hypertext transfer protocol.
This site is on the part
of the Internet known
as the World Wide Web.
This site belongs to a
company named Glencoe.
To find the specific Web pages
that accompany this book, your
browser follows the URL’s path
to a folder named “norton,” then
to a subfolder named “online.”
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Computing Essentials 2012: Making IT Work for You
More on Browsers
• Browsers interpret HTML commands
– Hypertext Markup Language
– Contained in a document
• Display document
as a Web page
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Computing Essentials 2012: Making IT Work for You
Communication
• Most popular Internet activity
• Types of communication
– Electronic Mail (E-Mail)
– Instant Messaging
– Social Networking
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Computing Essentials 2012: Making IT Work for You
E-Mail
• Transmission of electronic messages over the
Internet
• Basic parts
– Header
• Address
• Subject
• Attachment
– Message
– Signature Line
Return
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Computing Essentials 2012: Making IT Work for You
E-Mail Address Example
Return
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