Transcript Presentation

World Wide Web Guide *
for Students
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]
Username
Computer name & domain
Different Domains on the Net
.com
.net
.edu
.org
.net
.mil
.gov
commercial
network
educational
organization
network
military
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://
ftp://
gopher://
news:
telnet://
mailto:
hypertext transfer protocol (WWW)
file transfer protocol
gopher site
newsgroup
telnet
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
Directory
on the
server
Address
of ISP
Network
domain
html – Hypertext Markup Language
File name
(HTML
format)
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

Booker T. Washington Middle School
Library
THE END
Original Concept By
Ms. Daphne Elms
Addition Editing by
Clarence Hamilton
Washington Middle School
MCPSS
Mobile, Al.