In this lesson, we will discuss a brief overview of the internet and some fundamental concepts.

1. Introduction to the
Internet
FOLASADE ADEDEJI

2. Internet Basics

3. What exactly is the internet, and how
does it work?
 In this lesson, we will discuss a brief overview of the internet and some
fundamental concepts

4. Content
 Definition And History
 Basic services of INTERNET
 The World Wide Web (W.W.W.)
 WWW browsers
 INTERNET search engines
 Uses of INTERNET

5. Before
 The internet was used to search for information

6. Today
The Internet provides new ways of
 Accessing,
 Interacting and
 Connecting with people and content.
As a result, new terms are constantly appearing as new technologies are
introduced.

7. What is the Internet ?
 The internet is the largest computer network in the world, connecting
millions of computers.
 A network is a group of two or more computer systems linked together.

8. Types of computer
network There are two main types of computer
network
1. Local Area Network (LAN):
A LAN is two or more connected
computers sharing certain
resources in a relatively small
geographic location, often in
the same building
A Local Area Network (LAN)

9. Types of computer
network
2. Wide Area Network
(WAN):
• A WAN typically consists of
two or more LANs.
•The computers are farther
apart and are linked by
telephone lines, dedicated
telephone lines, or radio waves.
•The internet is the largest

10. Servers and Clients
 A server is a computer that "serves" many different computers in a
network by running specialized software and storing information.
 For example, web pages are stored on web servers.

11. Server-Client  A client runs familiar software such as
web browsers or email software.
 It communicates with the server to get
the information it requires.
When you access a web page, your
computer is acting as a client
A server with multiple clients

12. WWW
 The World Wide Web (WWW)
The World Wide Web is a virtual
network of web sites connected by
hyperlinks (or "links").
Web sites are stored on servers on the
internet,
The World Wide Web is a part of the
internet.

13. Difference between the Internet and
WWW
 The Internet is the physical network of computers all over the world.
 The World Wide Web is a virtual network of web sites connected by
hyperlinks (or "links"). Web sites are stored on servers on the internet, so
the World Wide Web is a part of the internet.

14. HTML
 HTML stands for Hyper Text Markup Language. A "markup language" is
a computer language that describes how a page should be formatted

15. Web Browser
 A Web browser is a computer program (also known as a software
application, or simply an application) that does two things:
1. A Web browser knows how to go to a Web server on the Internet and request a
page, so that the browser can pull the page through the network and into your
machine.
2. A Web browser knows how to interpret the set of HTML tags within the page
in order to display the page on your screen as the page's creator intended it to
be viewed.

16. URL (UNIFORM RESOURCE LOCATOR)
 The URL, also known as the web address, tells the browser exactly where
to find the page.
 However, most of the time, people get to a web page by following a link
from a different page or by searching for the page with a search engine.

17. Additional Info
 The foundation of the internet began in 1969, when the US Department of
Defense created ARPAnet, a project to allow military personnel to
communicate with each other in an emergency.
 By 2012, the number of internet users worldwide reached 2.4 billion—
about one third of the world's population.
 To store all of the information on the internet, you would need over 1
billion DVDs or 200 million Blu-ray discs.

18. Simple test
 A home network is an example of ______
 Web pages are stored on a _________
 A URL is usually typed in a browser's ___
 What is tabbed browsing used for?

19. Basic Service of the Internet
 Electronic Mail (E-Mail) –
Allow user to send a mail (message ) to another internet user in any part of
the world in a near-real-time manner .
 File Transfer Protocol (FTP) –
Allow user to move a file from one computer to another on the internet.
(Downloading, uploading)

20.  Telnet –
Allow a user to log into another computer somewhere on the internet .
 Common uses of telnet are:
- Using a software on the remote computer.
- Accessing remote computers data base or achieve.
- Logging into ones own computer from another computer.
 WWW

21. Additional Info

22. Some uses of the Internet
 On-line communication
 Software sharing
 Exchange of views on topics of common interest
 Posting of information of general interest
 Organization promotion
 Product promotion and feedback about products
 Customer support service
 On-line journals, magazines, Encyclopedia, and dictionary
 On-line shopping
 World-wide conferencing