The document discusses different aspects of the internet and computer networks. It defines a computer network as a collection of interconnected computers and hardware that allow sharing of resources and information. It describes some key advantages of networking like data sharing, hardware sharing, and internet access sharing. It also discusses different types of networks based on their size. The document then defines the internet as a global system of interconnected computer networks that use standard protocols to serve billions of users worldwide. It states that the internet is a decentralized system that allows anyone to communicate, publish ideas and sell products with low overhead costs. Finally, it discusses various uses of the internet like communication, accessing information, entertainment, online shopping, banking etc.

1. Internet and Its
Applications
By- Amresh Tiwari (SGEI)

2. Computer Network
A computer network is a
collection of computers and other
hardware components
interconnected by communication
channels (cables or satellites) that
allow sharing of resources and
information.
By - Amresh Tiwari, Sunbeam Suncity (School & Hostel)

3. Some of the advantages associated with
networking are:
• Data Sharing: Users can send text files, spread sheets, documents,
presentations, audio files, video files, etc. to other users.
• Hardware Sharing: Hardware components such as printers, scanners, etc. can
also be shared.
• Internet Access Sharing: You can purchase a single Internet connection and
share it among other computers in a network.
• Usage of network based applications: Such as web browsers, email clients,
chat application, audio & video calling, etc. is another advantage.
By - Amresh Tiwari, Sunbeam Suncity (School & Hostel)

4. Types of Network
A computer network can be categorized by their size. A computer
network is mainly of four types:-

5. By - Amresh Tiwari, Sunbeam Suncity (School & Hostel)

6. What is Internet?
• Internet= International Network
• The Internet is a global system of
interconnected computer networks that
use the standard Internet protocol suite
to serve billions of users worldwide. It is
a network of networks that consists of
millions of private, public, academic,
business, and government networks.
• Internet is a decentralized system.
• The Internet is the largest encyclopedia
for all age groups.
By - Amresh Tiwari, Sunbeam Suncity (School & Hostel)

7. “Internet is a decentralized system”. Justify this
statement.
By - Amresh Tiwari, Sunbeam Suncity (School & Hostel)
Each connected individual can communicate with anyone else on the internet, can publish ideas, and can
sell products with a minimum overhead cost. So that we can say that Internet is a decentralized system
not a centralized system like traditional broadcasting media, such as radio and television.
With the help of the World Wide Web, a popular service on the Internet, you can now access information
from a vast pool of resources in a few seconds.

8. Uses of the
Internet
By - Amresh Tiwari, Sunbeam Suncity (School & Hostel)

9. 1. You can use the Internet to communicate with
people all around the world instantaneously. The
messages you send over the Internet can reach
any part of the world in just a few seconds.
2. The Internet also helps you get the latest
information .on current events. Many leading news
channels use the Internet as the medium to provide
updated news.
3. You can use the Internet to
search for information on
any specific topic, such as
history of computers.
4. You can take any course of
your choice and register for
online certification exams
over the Internet.
5. The Internet can also be
used as a source of
entertainment. You can listen
to music, play games, watch
movies, or share pictures.
6. You can buy and sell products, such as books
and electronic goods, over the Internet. You can
also pay for these goods online by specifying your
credit card details.
7. You can use the Internet to perform
banking transactions, such as viewing details
of your bank account and transferring money
from one account to another.
By - Amresh Tiwari, Sunbeam Suncity (School & Hostel)

10. World Wide Web
• World Wide Web (abbreviated as
WWW or W3, commonly known as the
Web), is a system of interlinked
hypertext documents accessed via the
Internet. With a web browser, one can
view web pages that may contain text,
images, videos, and other multimedia,
and navigate between them via
hyperlinks.
By - Amresh Tiwari, Sunbeam Suncity (School & Hostel)

11. Getting access to the Internet
• To use the Internet, you need an a
computing device, a connection device
(such as a modem ) Internet
connection.
• Internet connections are provided by
Internet Service Providers such as Bharat
Sanchar Nigam Limited (BSNL), Airtel,
MTS, Vodafone, Tata Docomo, etc.
By - Amresh Tiwari, Sunbeam Suncity (School & Hostel)

12. Bandwidth
By - Amresh Tiwari, Sunbeam Suncity (School & Hostel)
Bandwidth is the amount of data that can be transmitted over a network in a
certain amount of time.
Bandwidth is measured in Mbps (megabits per second), Kbps (kilobits per
second), or bps (bits per second). If the bandwidth of a network is 1 Mbps, then 1
megabit of data can be transmitted over that network in 1 second.
The actual rate of transfer of data will vary depending on the ISP’s equipment,
the type of Internet connection, and the number of people using the same
connection at one time.

13. Internet Browser or
Web Browser
• Internet Browser is the software,
which helps you to access web pages
from various websites.
• There are various Internet browsers
available such as Google Chrome,
Mozilla Firefox, Safari, Opera and
Internet Explorer.
By - Amresh Tiwari, Sunbeam Suncity (School & Hostel)

14. What is Internet Service
Provider (ISP)?
By - Amresh Tiwari, Sunbeam Suncity (School & Hostel)

15. Internet Service Provider
An Internet service provider
(ISP) is an organization which
provides you with access to
the Internet via a dial-up
(using modem) or direct (hard
wired) or wireless
connection.
By - Amresh Tiwari, Sunbeam Suncity (School & Hostel)

16. Types of Common Internet Connectivity
• Choosing connectivity depends on the availability of a particular technology, speed and connection type in your area.
Different types of Internet connectivity categorized into wired and wireless are:-
, 4G
By - Amresh Tiwari, Sunbeam Suncity (School & Hostel)

17. Dial-up
• Dial-up Internet access is a form of Internet access that
uses the facilities of the public switched telephone
network (PSTN) to establish a connection to an Internet
service provider (ISP) via telephone lines using a device
called MODEM. Users dial a particular number provided
by the ISP and gain access to the Internet.
• Dial-up connections are extremely slow and in most
cases, it is replaced by a high speed connection such as
DSL or Cable Modem.
By - Amresh Tiwari, Sunbeam Suncity (School & Hostel)

18. Digital subscriber line(DSL):
• Digital subscriber line(DSL) provide Internet access
by transmitting digital data over wires of a local
telephone network. DSL service is delivered along
with wired telephone service on the same
telephone line. On the customer premises, a DSL
filter removes the high frequency interference,
enabling simultaneous use of the telephone and
data transmission. For using a DSL connection, you
need a DSL modem and a subscription.
By - Amresh Tiwari, Sunbeam Suncity (School & Hostel)

19. Cable Internet Access
• Cable Internet Access is a form of broadband
Internet access that uses the cable television
infrastructure. Cable Internet Access is
provided through existing cable TV networks;
this is similar to DSL that is provided over
existing telephone lines.
By - Amresh Tiwari, Sunbeam Suncity (School & Hostel)

20. WiMAX
• WiMAX (Worldwide Interoperability for
Microwave Access) is a wireless
communications standard designed to provide
mobile broadband connectivity across cities
and countries through a variety of devices.
• WiMAX is a long range system, covering many
kilometers and is typically used where DSL or
Cable Internet Access cannot be used; this
could be difficulty in laying out cables for home
or offices located in remote locations but need
access to the Internet.
By - Amresh Tiwari, Sunbeam Suncity (School & Hostel)

21. By - Amresh Tiwari, Sunbeam Suncity (School & Hostel)

22. WI-Fi (Wireless Fidelity)
• Wi-Fi is a popular technology that uses radio waves and allows an
electronic device such as computers or mobile phones to exchange data
wirelessly over a network, including high-speed Internet connections.
• Wi-Fi devices such as personal computer, smartphones, video game
console, etc. can connect to a network resource such as Internet through
a device called the Wireless Access Point (WAP).
• Wi-Fi is used where cables cannot be run (such as old buildings, outdoor
areas) to provide network and Internet access. Wi-Fi can also be used
where users require mobile connectivity.
• Wi-Fi connectivity is used in home & offices, hotels, college & school
campus typically for Internet Access. Shopping malls, coffee shops,
resorts mostly offer free or paid Wi-Fi access to the Internet for their
customers.
By - Amresh Tiwari, Sunbeam Suncity (School & Hostel)

23. Assessment
1. Name any three internet service providers in
India?
2. Name any three internet browsers?
3. Name any two internet search engines?
4. What do you know about ISP?
5. What do you understand about Bandwidth?
By - Amresh Tiwari, Sunbeam Suncity (School & Hostel)

24. Thank You…
By - Amresh Tiwari, Sunbeam Suncity (School & Hostel)