Transcript HINARI Initiative Workshop - ITOCA

HINARI/Basic Internet
Concepts
(module 1.1)
MODULE 1.1
Basic Internet Concepts
Instructions - This part of the:
course is a PowerPoint demonstration
intended to introduce you to Basic Internet
Concepts.
module is off-line and is intended as an
information resource for reference use.
Topics
 Basic Internet Concepts
 Structure of the Internet
 Common Internet Protocols
What is the Internet?
• Publicly accessible network of
interconnected computers which
communicate via software protocol
standards
• Easily accessed (via modem and phone
line, ISDN, direct cable landline, satellite)
• Expanding global infrastructure
• Regarding information delivery, the most
significant change since the development
of the printing press in the 15th century!
Internet Growth
• Exponential growth for the last few years
• The Web Server market has grown from
120,000 units in 1995 to 45 million in 2003
• In 1993, 90,000 people used the Internet; in
2002, 600 million people used the Internet; in
2007, over 1 billion people will use the Internet
• Hardware costs are decreasing year on year
• Over the next 10 years electronic commerce will
boom, reaching $100s of billions by the year
2010
Internet Architecture
Give me file x
Here it is
Desktop
computer “client”
Computer on the
Internet holding
information remote “server”
Server/Client Interface
SERVERS
Hardware
+ Software
Software
Protocols
CLIENTS
Hardware +
Software
Internet Services
• The World-Wide Web (Multimedia
Information Services)
• Search tools (via the World-Wide Web)
• Communication (E-mail, Telnet)
• Retrieval/information transfer (FTP)
The World Wide Web
• WWW, web, W3, World Wide Web
• Often what people mean by the Internet
• Based on hypertext - the ability to link text and
documents dynamically and interactively
• Uses hypertext markup language - HTML
• The WWW is a global standard
• Can use text, graphics, sound and video
• Anyone can link to and make use of the web
Means of Delivery
• Most often cables carry information back and
forth between the client and server
• 2nd principal option for delivery is satellite
• Cables vary in speed and amount of information
they can carry
• Sometimes cables are slow in carrying
information or lose the signal, especially if:
– information must cross long distances
– too much traffic on the cable
– cable capacity, or bandwidth, is low
Web Browser
• Browser is the software that is used to view the
Web
• Standard browser features
– scrolling, back, forward, stop, home, refresh
• Navigation - in built features
– back, forward, home, go to, yes, no
• Search on a single web page
• Multiple Web browser windows
Browser Customization
•
•
•
•
Toolbar options
Link to a specific homepage
Using the right click mouse button
Using favorites or bookmarks
– Adding
– Organizing
– Editing
Browser Requirements
HINARI works best with:
• Microsoft® Internet Explorer version 4.0 or higher
Standard versions included with Microsoft® Windows
98/ME/2K/XP are adequate. To download Internet
Explorer go to: http://www.microsoft.com/ie/download/
• Netscape version 6 or higher.
For a Netscape browser go to:
http://www.netscape.com/download/
• Mozilla Firefox version 1.0 or higher
For a Mozilla Firefox browser go to:
http://www.mozilla.com/en-US/firefox/
Adobe Acrobat PDFs
• You will need an Adobe Acrobat Reader to
view journal articles in PDF format.
• Adobe Acrobat Reader can be downloaded
for FREE from the Adobe web site:
http://www.adobe.com/prodindex/acrobat/readstep2.html
The Internet Address or URL
This page is being viewed in the
Internet Explorer Browser.
Browsers allow computers to read
Hyper Text Mark-up Language
OR HTML.
The Address or URL is typed in here.
Entering a URL address in the address box
After entering a URL address in the address
box click Go or hit the RETURN key. In this
example we have entered http://www.who.int
for the WHO website
Hypertext links
Links to other pages are usually
underlined or in another colour of
text.
Forward and back navigation buttons
The arrow buttons on the tool bar
allow users to move Back and
Forward to pages within the website.
Home page button
The House icon on the tool bar will
take you back to the browser’s
default Home Page.
This is the end of Module 1
This is the end of Module 1.1
There is a Work Book to accompany this part of
the module. The workbook will take you through
a live session covering the topics included in this
demonstration with working examples.
Updated 02 2008