part three the internet[1]
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Part Three
The Internet
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Objectives
Understand what the Internet is and how it works.
Understand what the Word Wide Web (WWW) is andhow 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 itworks.
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Internet or the Net
What is the
Internet?
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What is the Internet?
The Internetis a Networkof computernetworks linked together worldwide.
It is a public (global) network ofcomputers based on TCP/IP(Transmission Control rotocol!Internetprotocol) " Set of rules or standards
used by networked co!uters tocounicate to each other"
What is a network#
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What is the Internet? cont#
Internet is transport for information
Computer networks are linked b$ either copperwire%
&iber optic cables Wireless connection through satellite
The Internet is a $lobal network of networks.
eople and organi'ations connect onto theInternet so the$ can access its massie store of
shared information.
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What is the Internet? cont#
The Internet is an fundamentall$
!artici!ativemedium of working with
information.
n$bod$ can publish information or
create new serices.
The Internet is a cooperatie endeaour-- no organi'ation is in chargeof the
*et.
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+ow ,o I Connect to the Internet#
Computer
*etwork inks (connection) "
hone ine% Cables% digital
subscriber line (,)% Wireless% ... /odem
*etwork oftware - TC!I
pplication oftware "
0perating $stem%Web 1rowser%
Internet erice roider (I)
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Services on the Internet
Soe of the services on the Internet include% World Wide Web
ccessing arious websites
2-mail (2lectronic /ail)
2xchange of electronic messages
Internet 3ela$ Chat (I3C)
Instant communicating or chatting%
Chat rooms
*ewsgroups
2-commerce and e-business
Internet phone calls (&oice over Internet Protocol'&oIP
4
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Internet cont#
Internet erice roider (I)
compan$ that proides access to the Internetto indiiduals or companies. 2.g. /T*% UT
Web +osting roider (W+)
re companies that allows $ou a place to keep$our web site on their serer so people on theInternet can iew it. 2.g. 5olis.net%+ostingpot.com
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Internet cont#
Internet a worldwide network of computers, making information
available to everyone
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Internet cont#
0n these computers% people hae publishedinformation6 pages with text and pictures.
These pages are called 7webpages8 which arelinked to form 7websites8. There are millions ofwebsites on internet% with an enormous amountsof information which $ou can iew and use for
$our reading% research or fun9
These websites are accessed through a webbrowser
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Web (rowser
Web browseris an application software that
enables users to displa$ and interact with
web pages or websites.
It an application software that enables usersto access the Internet through different
websites.
The user can access6
2ither on WWW
0r the Intraweb
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Web (rowser cont"""
oftware for
accessing the
web
2xamples ofweb browser
software
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)eatures of a Web (rowser
:on;ueror
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Web (rowser cont"""
/o'illa&irefox
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*ddress window or +ocation window
The unifor resource locator(U3) is the
uni;ue identifier of a web page.
The location windowdispla$s the U3 of the
current page.
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Web (rowser cont#
,-ercise
0pen web browser
T$pe in address bar =www.google.com>
=www.bbc.co.uk>
=http6!!home.umu.ac.ug!>
=http6!!www.fiuc.org!umu>
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What is World Wide Web (www)
World Wide Web (WWW% =The Web>) is the
interconnection of the websites (documents)and Internet serices (2mail% I3C% etc)
Webpage - document on WWW Website
collection of linked Webpages under commonadministration% i.e. 0ne organisation like
Uganda /art$rs Uniersit$
The starting point for a web site sometimes iscalled a hoe !a$e.
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World Wide Web cont"
Web pages are stored in computers
called web servers"
n$ organi'ation can setup a web
serer.
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World Wide Web cont"
Intranet
http6!!home.umu.ac.ug
Website
http6!!www.fiuc.org!umu
http6!!www.umu.ac.ug
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.. Website
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World Wide Web cont"
Website Collection of web-pages under common
administration
2ach website has a uni;ue address .0+ 1 .nifor 0esource +ocator" is the
address of a web site.
The global address of a webpage (documents)
and other resources on the World Wide Web. U3s start wit http6!! which stands for h$pertext
transfer protocol
ccessed through web browsers
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Internet and www
,ifferences
Internet is interconnection of computernetworks
www is the interconnection of websites imilarities
The$ are accessed through web browsers
The$ use the same web technolog$
3esearch about the uses of www.
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Intranet
Wh$ does this website looks different from
the one I see when I am at the uniersit$#
What is an Intranet#
n Intranet is priate computer network ocal rea *etwork (*)
Intranets offer all the benefits of the Internet
but offer them priatel$
&or a particular organisation for example
Uganda /art$rs Uniersit$
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.. Intraweb
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Intranet cont#
1enefits of the Intranet
2xchange of e-mails with in the organi'ation
haring of information
haring resources
What do you think are the disadvanta$es of
the Intranet?
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,2ail
What is an e-mail#
2lectronic mail
Communication between two or more parties
ender and recipient need an email address ?username@domainA
rocedure
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,2ail cont#
2-mail language
Inbo- - 1ox for incoming messages
Sentor Outbo-" outgoing messages
Trash" 1ox for deleted messages Co!oseor New" Write a new message
Send" end message
+o$in orSin$ in +o$outor Si$n out
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,ail Clients 2 program that lets the user receie andsend electronic messages. ost eail client software allows you to% ,ispla$ a list of receied essa$es. 2ach essa$e
header shows $ou who sent the mail% the subBect line% thetime and date it was sent% and at times% the si'e of themessage.
elect the message header and read the message. Create new messages.
3epl$ to% forward% and delete messages. ttach files (called attachments) to messages $ou send. ,ownload the attachment. ae the attachments $ou receie.
*ccessin$ the ,2ail
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*ccessin$ the ,2ail cont#
+ow do I access m$ e-mail (U/U)#
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*ccessin$ the ,2ail cont"
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*ccessin$ the ,2ail cont#
+ow do I access m$ e-mail (U/U)#
1 - number of the message; 2 - date and time message arrived;
3 - name of the sender; - sub!ect of the email;
" - si#e of the message
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*ccessin$ the ,2ail cont"
+ow do I access m$ e-mail (
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3eading and sending a 2-mail
cont.
+ow do I read an e-mail message#
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*ccessin$ the ,2ail cont"
.se of 3ifferent (uttons The Sto!button stops page loading.
The 0eloadbutton fetches a fresh cop$ of
the page.
If the page is alread$ loaded% the Sto!button
free'es the animations.
4o backone page
4o forwardone page
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*ccessin$ the ,2ail cont"
The!ro$ress bar
illustrates page load
progress.
Do back
one page
Do back
one page
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3eading and sending a 2-mail cont.
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ttaching a file to 2-mail
+ow do I attach a file to a message#
Use Newbutton as $ou are sending message
ttachment " Click on (rowse
elect the file from its +ocation Click O!enbutton
Click *ddbutton
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ending and receiing message
ending pecif$ recipient
pecif$ subBect
Compose message end
3eceiing email
Do to inbox elect message
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ending and receiing message
cont.
Imagine receiing such a message#
The sender of this message is called
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2xercise
end an email to a classmate and CC to
another classmate
Use this address6 ba56768uu"ac"u$
3eceie that email
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Searchin$ the Internet
The underl$ing model is client2server.
Web serveris a program running on a
computer that is set up to sere documents to
other client computers that send re;uests fordocuments.
Web clientis a program that lets the user
re;uest documents from a serer. The serer
onl$ operates when a document is re;uested.
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Searchin$ the Internet cont#
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Web client is usuall$ a Web browser.
Its operation is as follows6
Client connects to a computer specified b$ a network
addressE
This address is called a.0+ 9.nifor 0esource
+ocator':
3e;uest is sent to the computerFs Web serer (http
serer)E
erer responds b$ sending the text and other mediaE
The document is in +T/ 9;y!erte-t arku!
+an$ua$e'"
Searchin$ the Internet cont#
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Searchin$ the Internet cont#
UsingSearch ,n$ines
search engineis a database of resources
that can be searched b$ keywords.
lta Gista ?www.altaista.comA
*orthern ight ?www.northernlight.comA
Doogle ?www.google.comA
T$pe in a ke$word e.g. Co!uter +iteracy
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Searchin$ the Internet cont#
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The next screen shows the results6 Dooglefound H.JK.KKK websites and shows $ou thefirst ten on this page.
2ach result is a 7link8 to a website containingthe ke$ word 7Co!uter +iteracy8. /oe$our cursor on a link and click to isit thatwebsite.
Use the mouse right button to open a newtab for each link$ou want to iew or 71ack8-button to go back to Doogle8s results andclick on another link.
Searchin$ the Internet cont#
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Searchin$ the Internet cont#
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;y!erlinks 1 What is hy!erlinks
;y!erlinkst$picall$ appear as highlighted
(underlined and coloured).
When $ou moe the ouse cursor over ahy!erlink< the arrow should change to a
=small hand pointing at the link when $ouFe
found a h$perlink. Click once to follow a h$perlink.
h$perlink can be a graphic% a work or set of
words.
Searchin$ the Internet cont#
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croll down using a ouseor scroll baron
the ri$ht sideof the search windowthe
page to see more links4
Doogle shows a little text from each website.Doogle also shows the address of the
website
t the bottom of each page% $ou can click tosee the next ten results.
Searchin$ the Internet cont#
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elect the text or information $ou hae searched.
Cop$ the information.
aste the text in the word processor $ou are using.
2dit% format $our test. ae $our text.
3emember to acknowledge the source of the text
under reference. ,-a!le%/c:a$ ,. 3.% $year%&Computer Literacy - An Important Skill"http6!!careerplanning.about.com!od!importantskills!a!compLliterac$.htm MGiewedNJrd eptember% NKOKP
Searchin$ the Internet cont#
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(ookarks
bookarkmarks $our place on the Web.
ress the 'ookmarkbutton for the bookmarks
menu.
elect dd 1ookmark to create a bookmarkfor the current page.
1ookmarks sta$ on the computer where $ou
make them. 1ookmarks are called favoritesor Internet
shortcutsin Internet 2xplorer
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0eview
What is Internet#
What is WWW#
What is a website#
What is a webpage#
What do $ou understand b$ an email#
What is an intranet% extranet% intraweb#
What is a web browser# What is a search engine#
+ow do $ou search the *et#
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The Web denture 1egins/ake sure $ou keep practice the new skills.
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Class *ssi$nent
Create a &ile T$pe one page of an$ useful information
Utilise all the basic skills we hae so far learnt on
how to work with a word2!rocessand the=,>(O*03 )it will earn you an additional mark*
ae $our file using a eanin$ful filenae
ttach it to a message% gie a eanin$ful
subject for your essa$e
end it to m$ email address% and
end a cop$ to $ourself
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