Introduction to internet

1. First step to internet

2. Internet stands for Interconnected Network. It is a huge
network of computers around the world. These
computers are connected to each other by telephone
wires.
The internet, a network of networks, is popular called
the Net.
What is internet?

3. In 1969,the Department of Defence of the United
States of America set up a network of computers called
the ARPANET. later, the department of defence allowed
universities to join the network of sharing resources.
History of the internet

4. Can get lot of information on any topic.
Can send messages to any part of the world.
Can chat with people on the internet.
Can buy things on the internet.
Can find images, videos and etc…
Uses of internet

5. To make your computer a part of the internet, following
are the requirements
 Modem
 Telephone line
 Internet Service Provider (ISP)
 Web browser
Requirements for connecting to the internet

6. A modem is a peripheral device that allows us to
connect and communicate with other
computers. Modem stands for Modulator
Demodulator. There are 2 types of modems
1. Internal modem
2. External modem
Modem

7. A telephone line is required to transfer data from one
computer to another computer. The computer is
connected to a modem, which is in turn connected to a
telephone line.
Telephone line

8. You need a subscription with any Internet
Service Provider(ISP) to get an internet
connection.
Sri Lanka Telecom
Mobitel
Dialog
ISP

9. A browser is a software application used to locate,
retrieve and display content on the World Wide Web,
including Web pages, images, video and other files.
Examples:
• Internet explorer
• Google Chrome
• Mozilla Firefox
• Opera
• Apple Safari
Web Browser

10. This addressing scheme assigns names and numbers to
identify computers on the internet. Theses names are
called domain names and the numbers are called IP
address.
A web address is the address or location of a website
on the internet.
Ex: http://www.yahoo.com
http://esoft.lk
Web Address

11. Home page
• The home page is the opening page or the
main page of a website. A home page typically
contains introductory information about the
website that has been accessed.

12. A URL (uniform resource locator), is an Internet or
intranet name that points to a location where a file,
directory or website page is hosted.
URL

13. • Web site is collection of one or more related
web pages . A web site is similar to a magazine .
You can move from one page to another on a
web site using the hyperlinks.
Moving from one website to another is called net
surfing.
Web site

14. • World Wide Web is a collection of web sites
and pages. This is the parts of the web that is
accessible to all of us.
World Wide Web (WWW)
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15. • The individual pages that collectively from the
World Wide Web are known as Web Pages .
These pages contain text ,graphics, audio,
video and links to other pages. There are
hyperlinks among web pages to connect each
page to another.
Web Page
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16. E-mail
Short for electronic mail, email (or e-mail) is defined as
the transmission of messages over communications
networks. Typically the messages are notes entered
from the keyboard or electronic files stored on disk.
With the internet, this whole process takes just a few
seconds allowing you to communicate quickly and
easily with millions of people around the world any
time in the day or night.

17. Advantages of E-mail
 Speed – email is far quicker than ordinary postage. A
message can reach any part of the world in a fraction
of a second.
 Cost-You can send as many messages, files, videos,
documents and presentations as you want without
having to pay anything.
 Content – the message may consist of only a few text
or several thousand lines. Unlike the postal services,
the message is not charged by weight.

18. E mail address
An email address identifies an email box to which
email messages are delivered. Each user has a
unique username or login name. The user’s login
name comes first and is separated from the
computer’s domain name by an @ symbol.
Example:

19. Features of e-mail
An e-mail program enables us to send and receive and
manage our messages. Users are entirely responsible
for the maintenance and confidentially of the password
and the account.
• Reply to a mail – This help us to reply to a message.
Our reply can include the original message.
• Forward a message – we can forward a message we
have received to someone else.
• Inbox – this folder gives you details of incoming mail.
Entries of unread messages are displayed in bold.

20. • Outbox – this folder helps you store your messages for
dispatch while you are not connected to the internet.
The send button will move the message to the outbox.
• Send/receive – the send or receive option check for new
mail on your mail server and send out the messages in
your outbox folder.
• Attachment –Files may be attached with an e-mail
message. This is a convenient method of sharing both
data and programs.

21. E-mail services on the internet
Many service providers offered e-mail accounts free of
cost. First you have to register choose an e-mail ID and
give a password to avail of this service.
Some of the sites which offers this service are:
 www.google.com
 www.yahoo.com
 www.msn.com

22. How to open an account
1. Connect to the internet
2. Open any web browser
3. Type www.google.com in the address bar and press
enter key.
4. To open a new account , click on sign up.
5. Fill in the information and follow the steps.
6. If all the entries are filled in properly, your account
will be created.

23. What your e-mail account offers you?
• Inbox
• Write mail
• Signature
• Send