Transcript 2008 tia chp 3 begx

What is it?
It
• Belongs to no one
• Disorganized
• Complex
• Not governed by anyone
• Services over 3 billion people
Works!
with Microsoft Office 2007 Introductory
© 2008 Pearson Prentice Hall
My notes
1
Internet
Internet is basically a collection of computers
all over the world linked with telephone like
connections.
• More than 100 million web sites are online
• Send messages to other users
• Access information about anything
• Meeting or conversing with people around the
world (chat rooms, instant messaging)
• Make purchases (e-commerce)
• Apply for a job
127 & My notes
with Microsoft Office 2007 Introductory
© 2008 Pearson Prentice Hall
2
Internet
Was Created in 1969
…..
ARPNET was developed by the Department of
Defense as a means to communicate
128
with Microsoft Office 2007 Introductory
© 2008 Pearson Prentice Hall
3
World Wide Web
World Wide Web
• Was created in 1989…..
• Linking documents together in order to make
related information easier to find.
• Web pages are linked together via hyperlinks.
www.dccc.edu
• Means to access information over the internet
• Used primarily by scientists, educators, military.
128
with Microsoft Office 2007 Introductory
© 2008 Pearson Prentice Hall
4
In 1989….Why weren’t we using the web?
YOU NEEDED TO USE COMMAND LIKE
LANGUAGE TO INTERFACE WITH THE WEB
with Microsoft Office 2007 Introductory
© 2008 Pearson Prentice Hall
5
Web Browser
• In 1993, the first web browser was created.
• Simplifies working on the web by using
graphical access (point and click method).
• No more command-line language means…..
everyone can use it!
• Internet Explorer 7.0 is a web browser
128
with Microsoft Office 2007 Introductory
© 2008 Pearson Prentice Hall
6
Uniform Resource Locator (URL)
Web Address
Part of the Web Address
Description
http
Hypertext Transfer Protocol. A protocol
is a set of rules for transferring data
over the Internet.
://
Separates the protocol from the rest of
the Web address.
www.firstgov.gov
The domain name and extension.
.gov (government), .com (commercial),
.edu (education), .org (organization),
.net (network), .mil (military), and .mus
(music). Most countries have their own
domain types such as .ca for Canada
and .fr for France
Domain name
Domain Type
or Extension
with Microsoft Office 2007 Introductory
© 2008 Pearson Prentice Hall
113
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3 Ways to Search
1. Search engine
•
Uses your keywords or phrases to search the web with….
•
A software program called a spider that collects data
on the web
•
Organizes and indexes it in a large data base
•
Pulls out relevant indexed data according to criteria
•
Uses algorithms to rank each site
Why do some results from Google and Yahoo differ?
–
Depends on how the algorithm ranks the indexed site.
Google.com, AlltheWeb.com, Ask.com
with Microsoft Office 2007 Introductory
© 2008 Pearson Prentice Hall
117
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3 Ways to Search
2. Metasearch engine
•
Queries multiple search engines using keywords
and phrases to search the web
•
Searches the results of search engines
•
Does not search the web itself
•
Broad but not deep results
Dopile.com – mama.com – turbo10.com
117 & My notes
with Microsoft Office 2007 Introductory
© 2008 Pearson Prentice Hall
9
3 Ways to Search
1. Subject Directories
•
Use a hierarchy to drill down to information
•
Example: Health – Women’s Health – Eating Disorders
•
Use if topic is general
•
Best place to begin research
•
Picked by subject experts
•
Quality vs. Quantity
lii.org - vlib.org - http://infomine.ucr.edu
118 & My notes
with Microsoft Office 2007 Introductory
© 2008 Pearson Prentice Hall
10
Biggest Mistakes
When using search engines…
• Using 1 keyword
• Not putting the most important keyword first
• Common words not useful a, an, the, in, for, on,
into, however, probably, this
• Not using the advance search pages
• Spelling errors
My notes
with Microsoft Office 2007 Introductory
© 2008 Pearson Prentice Hall
11
Evaluating Search Results
• Author – credentials – contact info
• Tone/Content appropriate for the
audience
• Is the site bias?
• Spelling and grammar
• Is the information current?
– Computers, sports, company information
needs to be current
with Microsoft Office 2007 Introductory
© 2008 Pearson Prentice Hall
119 & My notes
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