2. 01/31/15 Mugerwa Richard
Objectives
Understand what the Internet is and how it works.
Understand what the Word Wide Web (WWW) is and
how it works.
To understand the use of web browser.
To understand how to use the e-mail.
To differentiate between the Internet and WWW.
To differentiate between the Internet and Intranet.
To differentiate between the Intranet and extranet.
To differentiate between the Website and www.
To differentiate between the Website and Intraweb.
To understand what a search engine is and how it
works.
4. 01/31/15 Mugerwa Richard
What is the Internet?
The Internet is a Network of computer
networks linked together worldwide.
It is a public (global) network of
computers based on TCP/IP
(Transmission Control Protocol/Internet
protocol) – Set of rules or standards
used by networked computers to
communicate to each other.
What is a network?
5. 01/31/15 Mugerwa Richard
What is the Internet? cont…
Internet is transport for information
Computer networks are linked by either copper
wire,
Fiber optic cables
Wireless connection through satellite
The Internet is a global network of networks.
People and organizations connect onto the
Internet so they can access its massive store of
shared information.
6. 01/31/15 Mugerwa Richard
What is the Internet? cont…
The Internet is an fundamentally
participative medium of working with
information.
Anybody can publish information or
create new services.
The Internet is a cooperative endeavour
-- no organization is in charge of the
Net.
7. 01/31/15 Mugerwa Richard
How Do I Connect to the Internet?
Computer
Network Links (connection) –
Phone Line, Cables, digital
subscriber line (DSL), Wireless, ...
Modem
Network Software - TCP/IP
Application Software –
Operating System,
Web Browser,
Internet Service Provider (ISP)
8. 01/31/15 Mugerwa Richard
Services on the Internet
Some of the services on the Internet include:
World Wide Web
Accessing various websites
E-mail (Electronic Mail)
Exchange of electronic messages
Internet Relay Chat (IRC)
Instant communicating or chatting,
Chat rooms
Newsgroups
E-commerce and e-business
Internet phone calls (Voice over Internet
Protocol)VoIP
…
9. 01/31/15 Mugerwa Richard
Internet cont…
Internet Service Provider (ISP)
A company that provides access to the Internet
to individuals or companies. E.g. MTN, UTL
Web Hosting Provider (WHP)
Are companies that allows you a place to keep
your web site on their server so people on the
Internet can view it. E.g. Jolis.net,
Hostingpot.com
11. 01/31/15 Mugerwa Richard
Internet cont…
On these computers, people have published
information: pages with text and pictures.
These pages are called ‘webpages’ which are
linked to form ‘websites’. There are millions of
websites on internet, with an enormous amounts
of information which you can view and use for
your reading, research or fun!
These websites are accessed through a web
browser
12. 01/31/15 Mugerwa Richard
Web Browser
Web browser is an application software that
enables users to display and interact with
web pages or websites.
It an application software that enables users
to access the Internet through different
websites.
The user can access:
Either on WWW
Or the Intraweb
13. 01/31/15 Mugerwa Richard
Web Browser cont...
Software for
accessing the
web
Examples of
web browser
software
16. 01/31/15 Mugerwa Richard
Address window or Location window
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 the URL
Features of a Web Browser
17. 01/31/15 Mugerwa Richard
Web Browser cont…
Exercise
Open web browser
Type in address bar “www.google.com”
“www.bbc.co.uk”
“http://home.umu.ac.ug/”
“http://www.fiuc.org/umu”
18. 01/31/15 Mugerwa Richard
What is World Wide Web (www)
World Wide Web (WWW, “The Web”) is the
interconnection of the websites (documents)
and Internet services (Email, IRC, etc)
Webpage - document on WWW
Website
collection of linked Webpages under common
administration, i.e. One organisation like
Uganda Martyrs University
The starting point for a web site sometimes is
called a home page.
19. 01/31/15 Mugerwa Richard
World Wide Web cont.
Web pages are stored in computers
called web servers.
Any organization can setup a web
server.
20. 01/31/15 Mugerwa Richard
World Wide Web cont.
Intranet
http://home.umu.ac.ug
Website
http://www.fiuc.org/umu
http://www.umu.ac.ug
22. 01/31/15 Mugerwa Richard
World Wide Web cont.
Website
Collection of web-pages under common
administration
Each website has a unique address
URL – Uniform Resource Locator – is the
address of a web site.
The global address of a webpage (documents)
and other resources on the World Wide Web.
URLs start wit http:// which stands for hypertext
transfer protocol
Accessed through web browsers
23. 01/31/15 Mugerwa Richard
Internet and www
Differences
Internet is interconnection of computer
networks
www is the interconnection of websites
Similarities
They are accessed through web browsers
They use the same web technology
Research about the uses of www.
24. 01/31/15 Mugerwa Richard
Intranet
Why does this website looks different from
the one I see when I am at the university?
What is an Intranet?
An Intranet is private computer network
Local Area Network (LAN)
Intranets offer all the benefits of the Internet
but offer them privately
For a particular organisation for example
Uganda Martyrs University
26. 01/31/15 Mugerwa Richard
Intranet cont…
Benefits of the Intranet
Exchange of e-mails with in the organization
Sharing of information
Sharing resources
What do you think are the disadvantages of
the Intranet?
27. 01/31/15 Mugerwa Richard
E-mail
What is an e-mail?
Electronic mail
Communication between two or more parties
Sender and recipient need an email address
<username@domain>
Procedure
28. 01/31/15 Mugerwa Richard
E-mail cont…
E-mail language
Inbox - Box for incoming messages
Sent or Outbox – outgoing messages
Trash – Box for deleted messages
Compose or New – Write a new message
Send – Send message
Login or Sing in
Logout or Sign out
29. 01/31/15 Mugerwa Richard
Email Clients - program that lets the user receive and
send electronic messages.
Most email client software allows you to:
Display a list of received messages. Each message
header shows you who sent the mail, the subject line, the
time and date it was sent, and at times, the size of the
message.
Select the message header and read the message.
Create new messages.
Reply to, forward, and delete messages.
"Attach" files (called attachments) to messages you send.
Download the attachment.
Save the attachments you receive.
Accessing the E-mail
32. 01/31/15 Mugerwa Richard
Accessing the E-mail cont…
How do I access my e-mail (UMU)?
1 - number of the message; 2 - date and time message arrived;
3 - name of the sender; 4 - subject of the email;
5 - size of the message
35. 01/31/15 Mugerwa Richard
Accessing the E-mail cont.
Use of Different Buttons
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.
Go back one page
Go forward one page
38. 01/31/15 Mugerwa Richard
Attaching a file to E-mail
How do I attach a file to a message?
Use New button as you are sending message
Attachment – Click on Browse
Select the file from its Location
Click Open button
Click Add button
39. 01/31/15 Mugerwa Richard
Sending and receiving message
Sending
Specify recipient
Specify subject
Compose message
Send
Receiving email
Go to inbox
Select message
40. 01/31/15 Mugerwa Richard
Sending and receiving message
cont.
Imagine receiving such a message?
The sender of this message is called "Your
Name" and we do not know what the
message is about.
The use of CC
The use of Subject
41. 01/31/15 Mugerwa Richard
Exercise
Send an email to a classmate and CC to
another classmate
Use this address: bam2010@umu.ac.ug
Receive that email
42. 01/31/15 Mugerwa Richard
Searching the Internet
The underlying model is client-server.
A Web server is a program running on a
computer that is set up to serve documents to
other client computers that send requests for
documents.
A Web client is a program that lets the user
request documents from a server. The server
only operates when a document is requested.
44. 01/31/15 Mugerwa Richard
A Web client is usually a Web browser.
Its operation is as follows:
Client connects to a computer specified by a network
address;
This address is called a URL (Uniform Resource
Locator);
Request is sent to the computer's Web server (http
server);
Server responds by sending the text and other media;
The document is in HTML (Hypertext Markup
Language).
Searching the Internet cont…
45. 01/31/15 Mugerwa Richard
Searching the Internet cont…
Using 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>
Type in a keyword e.g. Computer Literacy
47. 01/31/15 Mugerwa Richard
The next screen shows the results: Google
found 7.630.000 websites and shows you the
first ten on this page.
Each result is a ‘link’ to a website containing
the key word ‘Computer Literacy’. Move
your cursor on a link and click to visit that
website.
Use the mouse right button to open a new
tab for each link you want to view or ‘Back’-
button to go back to Google’s results and
click on another link.
Searching the Internet cont…
49. 01/31/15 Mugerwa Richard
Hyperlinks – What is hyperlinks
Hyperlinks typically appear as highlighted
(underlined and coloured).
When you move the mouse cursor over a
hyperlink, the arrow should change to a
“small hand pointing at the link" when you've
found a hyperlink.
Click once to follow a hyperlink.
A hyperlink can be a graphic, a work or set of
words.
Searching the Internet cont…
50. 01/31/15 Mugerwa Richard
Scroll down using a mouse or scroll bar on
the right side of the search window the
page to see more links…
Google shows a little text from each website.
Google also shows the address of the
website
At the bottom of each page, you can click to
see the next ten results.
Searching the Internet cont…
51. 01/31/15 Mugerwa Richard
Select the text or information you have searched.
Copy the information.
Paste the text in the word processor you are using.
Edit, format your test.
Save your text.
Remember to acknowledge the source of the text
under reference.
Example: McKay D. R., (year). Computer Literacy - An Important Skill.
http://careerplanning.about.com/od/importantskills/a/comp_literacy.htm [Viewed
23rd September, 2010]
Searching the Internet cont…
52. 01/31/15 Mugerwa Richard
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.
Press and hold down on the Back or
Forward buttons to see the list of web pages
you visited.
53. 01/31/15 Mugerwa Richard
Bookmarks
A bookmark marks your place on the Web.
Press the Bookmark button for the bookmarks
menu.
Select "Add Bookmark" to create a bookmark
for the current page.
Bookmarks stay on the computer where you
make them.
Bookmarks are called favorites or Internet
shortcuts in Internet Explorer
54. 01/31/15 Mugerwa Richard
Review
What is Internet?
What is WWW?
What is a website?
What is a webpage?
What do you understand by an email?
What is an intranet, extranet, intraweb?
What is a web browser?
What is a search engine?
How do you search the Net?
56. 01/31/15 Mugerwa Richard
Class Assignment
Create a File
Type one page of any useful information
Utilise all the basic skills we have so far learnt on
how to work with a word-process and the
KEYBOARD [it will earn you an additional mark]
Save your file using a meaningful filename
Attach it to a message, give a meaningful
subject for your message
Send it to my email address, and
Send a copy to yourself