Transcript Welcome to the Internet

7/17/2015
INTRODUCTION TO INTERNET AND
WORLD WIDE WEB (WWW)
February 23, 2010
ADB GRANT 0133-CAM: PUBLIC FINANCIAL MANAGEMENT IN RURAL
DEVELOPMENT MINISTRIES (COMPONENT 1)
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WHAT IS THE INTERNET?
The Internet, in simplest terms, is a large group
of millions of computers around the world that
are all connected to one another. These
computers are connected by phone lines, fiber
optic lines, coaxial cable, satellites and wireless
connections.
 When you log on to the Internet you are given
access to all the other computers that are
connected around the world – although for
some you need passwords.

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WHAT IS A NETWORK?

A Network is where 3 or more computers are
connected to each other by phone lines, fiber
optic lines, coaxial cable, satellites and wireless
connections and can share information.
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WELCOME TO THE INTERNET
•
•
•
•
The Internet is a global network of networks.
People and organizations connect into the
Internet so they can access its massive store of
shared information.
The Internet is an inherently participative
medium. Anybody can publish information or
create new services.
The Internet is a cooperative endeavor -- no
organization is in charge of the internet.
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WHERE DID THE INTERNET COME FROM?

Three decades ago, the RAND Corporation
struggled with possible ways for US authorities
to successfully communicate after a nuclear
war. Their chief concern was that any central
network control center might be destroyed by
an enemy missile. In a plan made public in
1964, the RAND Corporation proposed that the
new network have no central authority.
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HOW BIG IS THE INTERNET?

As of Jan. 2009, there were over 99
million hosts on the Internet.
Africa
Asia
Europe
Middle East
North America
South America
Oceania
World Total
Pop Est 2009 Internet Users %
991,002,342
67,371,700
3,808,070,503
738,257,230
803,850,858
418,029,796
202,687,005
57,425,046
340,831,831
252,908,000
586,662,468
179,031,479
34,700,201
20,970,490
6,767,805,208
1,733,993,741
7%
19%
52%
28%
74%
31%
60%
26%
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HOW DO I CONNECT TO THE INTERNET?
Computer (now increasingly phones!)
 Connection - Phone Line,
Cable, DSL, Wireless, ...
 Modem
 Network Software - TCP/IP
 Application Software - Web Browser, Email, ...
 Internet Service Provider (ISP)

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WHAT CAN I DO ON THE INTERNET?
Send and receive email messages.
 Download free software with FTP
(File Transfer Protocol).
 Post your opinion to a Usenet newsgroup.
 Yack it up on IRC (Internet Relay Chat).
 Surf the World Wide Web.
 And much, much more.
 There is no charge for most services.

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WHAT IS THE WORLD WIDE WEB?
The Web was invented in
1991 by Tim Berners-Lee,
consulting at CERN
(European Organization for
Nuclear Research) in Switzerland.
 The Web is a distributed information system.
 The Web contains multimedia.
 Information in the Web is connected by
hyperlinks.

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BROWSING THE WEB
A web page is a
document on the
World Wide Web.
 A web browser is
the computer program
you use to retrieve and
view web pages.
 The most popular browsers are Microsoft
Internet Explorer and Netscape Navigator.

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SERVING THE WEB
Web pages are stored in computers called web
servers.
 Any organization can setup a web server.
 A web site is a collection of web pages.
 The starting point for a web site sometimes is
called a home page.

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HYPERLINKS
Hyperlinks typically
appear as highlighted
(underlined and
colored) phrases.
 Your mouse cursor will
turn to a "pointing finger"
when you've found a hyperlink.
 Click once to follow a hyperlink.
 Graphics can be hyperlinks.

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YOU CAN'T GET LOST ON THE WEB
Your browser remembers
where you've been.
 Use the Back and Forward
buttons to retrace your path.
 Use the Home button
to return to your start page.
 Power Skill: Press and hold down on the
Back or Forward buttons to see the list of web
pages you visited.

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WHAT'S THE URL?
The uniform resource locator
(URL) is the unique identifier
of a web page.
 The location window displays
the URL of the current page.
 You can go directly to a web page if you know
its URL: click once in the location window and
type it in.

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WHAT'S ON THE WEB PAGE?
Some sites use advertising
to subsidize free content.
 Most large web sites have
some navigation scheme
to find information.
 Links on the home page will bring you directly
to featured content.

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WEB PAGE LOAD STATUS
The logo animates
during page load.
 The progress bar
illustrates page
load progress.
 The status bar displays
page load status.

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STOP & RELOAD
The Stop button stops
page loading.
 The Reload button
fetches a fresh copy
of the page.
 If the page is already
loaded, the Stop button freezes the animations.

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BOOKMARKS
A bookmark marks your place on the Web.
 Press the Bookmark button for its menu.
 Select "Add Bookmark” to create a bookmark
for the current page.
 Bookmarks stay on
the computer where
you make them.

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WEB SECURITY
Secure web pages use encryption to protect
from eavesdroppers.
 Secure web pages
use https.
 The lock icon closes
on a secure page.
 The privacy policy should tell you what the
recipient will do with that information.

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NOW YOU'RE A REAL WEB BROWSER

That's everything you need to know to browse
the Web.

Now, an even bigger challenge lies ahead:
learning how to find the information you want.
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FINDING INFORMATION: WEB DIRECTORIES
A web directory lists resources, organized by
subject area.
 PFMRD<www.pfmrd.org.kh>
 LookSmart <www.looksmart.com>
 Wikipedia <www.wikipedia.org>
 Job wanted <www.bongthom.com>
 Librarian's Index to the Internet <www.lii.org>

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FINDING INFORMATION: SEARCH ENGINES
A search engine is a database of resources
that can be searched by keywords.
 Alta Vista <www.altavista.com>
 Northern Light <www.northernlight.com>
 Google <www.google.com>

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FINDING INFORMATION
Web Directory
Search Engine
Easier to use.
More resources.
Good for general subject
searches or browsing.
Good for searches where you
can use specific keywords.
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PC SKILLS: MOUSE CONTROL
Don't twist the mouse; make sure the tail
points straight back.
 Everything we do will use mouse button one -the one under your index finger.
 Most everything will be a single click.
 Do not move the mouse while clicking. If you
do, the computer will do something dumb, like
turn the words purple, instead of what you
want.
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PC SKILLS: SCROLL BARS

Click the button to
scroll one line.

Click in the trough to
scroll a screenful.

Press and drag the slider to scroll continuously.
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THE WEB ADVENTURE BEGINS
Thank you for attending our class.
 Be sure to practice your new skills.
 Good luck!

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