HINARI/Basic Internet Concepts(module 1.1)

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.

MODULE 1.1 Basic Internet Concepts

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 holdinginformation - remote “server”

Server/Client Interface

SERVERS

CLIENTS

Hardware + Software

Hardware + Software

SoftwareProtocols

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 higherStandard 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