COMPUTER HARDWARE

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Transcript COMPUTER HARDWARE 

INTERNET
CHAPTER 12
Information Available
The INTERNET contains

a huge amount of
information

information on any topic
you can think of

information in the form of
web pages
Web Page
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5 INTERNET SERVICES
WORLD WIDE WEB (WWW):
A collection of information
held in multimedia form on
web pages
ELECTRONIC MAIL:
Sending / receiving
messages
FILE TRANSFER:
NEWSGROUPS: Subscribe to
Downloading / uploading files
send & receive messages
between computer & server
from people in the same
interest group
INTERNET RELAY CHAT: Having a ‘conversation’
by instantly sending & receiving messages online
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BROWSERS
A browser is a program that allows the user to
browse or surf through the World Wide Web
Examples of browsers are:
Firefox
INTERNET
EXPLORER
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MODEM
A modem is needed


when using a
telephone line to
connect to an internet
service provider’s
(ISP’s) computer
at each end of the link
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Modem 1
Modem 2
Telephone
Link
Internet Ready Computer

An internet ready computer consists of:
COMPUTER SYSTEM
MODEM
external or internal
Suitable COMMUNICATIONS SOFTWARE
e.g. a browser & an email client program
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WORLD WIDE WEB


A collection of information held on the internet
on web pages
Information is held in multimedia form
e.g. text, graphics, sound, animation, movie
Web Page
Web Page

Single document of information

Stored at locations (web sites)

Accessed using a browser
General
HYPERLINK
Click on a link to activate it
Links between:
www.google.co.uk
 WWW pages
 Documents
 Files
<HTML>
<HEAD>
<TITLE>FEE'S wEBSITE:Welcome</TITLE>
</HEAD>
<BODY>
<P ALIGN = CENTER>
Welcome to My Website!
</P>
<P ALIGN = CENTER>
<IMG SRC="images/my-picture-1.jpg">
</P>
</BODY>
</HTML>
HYPERLINK EXAMPLE
HTML

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
Hyper Text Mark-up Language
Computer language used to
create web pages
Web authoring software makes
it easy to create web pages
General
SEARCH ENGINES



Designed to help find information
Enter keyword (s) to find related information
Examples are Google or Ask
There are 2 types of search:
SIMPLE search (G):
 One keyword entered into
an entry box
 A button or ENTER is
pressed to activate the
search
 Related sites are found
COMPLEX search (C):
 Searches using >1 criteria
 Restricts search to certain parts
of the web or selecting options
from a menu
 Can use AND, OR, NOT
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INTERNET CONNECTION
DIAL-UP
 Dial up connection
using phone line
 Pay-as-you-go so
adds to phone bill
 Slow performance
speed
Broadband
 Computer always
connected to ISP
 Fast data transfer
speeds
 Can use phone &
internet together
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INTERNET CONNECTION
ONLINE

When computer is
Offline
connected to internet

When a dial-up
connection is active

Online
OFFLINE
 When computer is not
connected to internet
When a dial-up connection
is not active
General
INTERNET SERVICE PROVIDER
An ISP
 company provides internet
services: WWW, e-mail,
file transfer, chat,
newsgroups
 can provide web storage,
chat facilities & web mail.
 Examples of ISP’s are AOL,
BT, Tiscali
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DOWNLOADING SOFTWARE
3 types of software available for download
Commercial Software
It must be paid for to be used
Shareware Software
Trial period then has to be paid for
e.g. after 30 days
Freeware Software
Totally free and can be used on any number of
computer systems
MOBILE INTERNET
TECHNOLOGIES
The use of portable hardware to connect
to the internet
Laptop
Are mobile internet technology examples
VIDEO CONFERENCING
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Using internet links to conduct meetings
Meetings can take place between people
who are large distances apart
Hardware required is
–
–
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webcam & screen
microphone & speakers
Saves fuel, travel time but do not meet
people face to face
That’s all folks!
Thanks for staying awake.