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World Wide Web Guide * for Students
to the Internet
Presentation
Definition of the Internet Approach to the Internet History of the Internet Searching the Web & evaluation Internet tools software
The Internet is a...
...distributed
hypermedia
network
of networks
Distributed
Information on the Internet is located on many millions of computers
No one agency has jurisdiction of the Internet; everyone plays a part
Hypermedia
The Internet supports many different
formats of information Text files Pictures Photographs Sound files Video files
Network of Networks
Network : two or more computers hooked together
TCP/IP is the language
of the Internet that allows
unlikecomputers to “talk” Network of networks : over 40,000
networks of computers all hooked together
The Internet is a...
Distributed Hypermedia Network of networks
How to Approach the Internet
Don’t get frustrated Keep it simple Give yourself time to explore Find a mentor to help Look for personal interests first
History of the Internet Started in 1969 by the Advanced Research
Projects Agency (ARPA)
The Department of Defense wanted a system that would still work if part of it were destroyed
In 1983, the research computers that were networked became ARPANET
History of the Internet
In 1986 the National Science Foundation took the initiative and ran the network backbone
In 1995, the NSF stepped out and commercial providers took over the Internet
E-Mail Addresses
Username followed by “@” symbol Computer name and domain Domains : net, org, edu, mil, gov, com
[email protected] Computer name & domain
Different Domains on the Net
.com commercial
.net network
.edu educational
.org organization
.net network
.mil military
.gov government
URL: Uniform Resource Locator “Address” of a file on the Internet Contains type of protocol followed by the
computer name, directory and file name
http:// hypertext transfer protocol (WWW)
ftp:// file transfer protocol
gopher:// gopher site
news: newsgroup
telnet:// telnet
mailto: e-mail address
Speaking “URL”http://www.capecod.net/~kschrock/index.htm
h-t-t-p colon slash slash
w-w-w dot capecod dot net
slash tilde kschrock
slash index dot htm
Anatomy of a URL
http://www.capecod.net/schrockguide/eval.htm
Hypertext Transfer Protocol
Address of ISP
Networkdomain
Directory on the server
File name (HTML format)
html – Hypertext Markup Language
The World Wide Web
A global network of information servers Information may be in the form of text,
audio, video, or animation Many millions of sites containing
documents with links to other documents Fastest growing area of the Internet
Finding Information on the WWW
Search Engines Software programs that scan the
contents of Web servers to create large indices of information
User can perform keyword searches of these indices; combining of terms
AltaVista, Lycos, Webcrawler, HotBot
Finding Information on the WWW
Directories Collections of resources compiled and
organized by a person May be searchable via keyword May be general or subject-specific Yahoo, Magellan, Lycos A2Z
Evaluating Information on the Net
Who wrote it? When was it written? Why was it written? Is it biased? Is it authentic? Is the author an
expert?
Is the page easy to use? Is the page free from
HTML errors? Are the graphics useful? Can you verify the
information? Is a bibliography
included?
World Wide Web Browser Allows you to view WWW sites which contain text,
pictures, and sound
Netscape vs. Internet Explorer vs. Mosaic
After installation, browsers must be configured for your machine
Easy to move back and forth between pages due to cache
Parts of a Browser Window
Menu Tool Bar URL Field
Document viewing area
Status Bar
Browser Configuration and Helper Applications The browser can display text and certain formats
of pictures For other formats the browser needs to have
“helper applications” configured
Example:
If you choose a sound file, you have to have told the browser what piece of software on your machine is to be run to play the file
Saving File to Disk
File-Save on browser menu Choose whether you want to save as a
HTML or text file Choose location for saving Does not save graphics, only text To save graphics, position cursor and use
right mouse button to “save this image as...”
The Internet is useful when you need to know something that is...
not in your textbooks or library based on data collected by the government likely to require specialized knowledge best understood from eyewitness accounts fast-breaking news
The Internet is not useful for...
a quick overview or definition of a topic face-to-face interaction with other students
and teachers drawing, writing, building, planting, or any
other type of hands-on activities
The Internet is also good for :
collaborating on projects with students all over the world
finding and contacting experts getting real-world experience in researching
and evaluating information publishing students’ projects and
publications
THE ENDOriginal Concept By Ms. Daphne ElmsAddition Editing byClarence HamiltonWashington Middle SchoolMCPSSMobile, Al.
Booker T. Washington Middle School Library