The Internet is a global network that connects billions of computers and devices together. It was developed in the 1970s by researchers and scientists seeking to link computer networks together. Key figures in its development include Robert Taylor and Vinton Cerf. The Internet works by connecting networks of devices around the world through telephone lines, wireless connections, and broadband. It allows people to share information and communicate globally. Common uses of the Internet include e-commerce, online payments, education, social networking, and entertainment. While it provides many advantages like access to information, online transactions, and communication, overuse can lead to issues like cybercrime, health impacts, and time wasted on unproductive activities.

1. INTERNET

2. What is internet?
• The Internet is a vast network that connects computers all
over the world. Through the Internet, people can share
information and communicate from anywhere with an
Internet connection.

3. Who invented Internet?
• Who invented the Internet?
• The Internet consists of technologies developed by different
individuals and organizations. Important figures include Robert W.
Taylor, who led the development of the ARPANET (an early prototype
of the Internet), and Vinton Cerf and Robert Kahn, who developed
the Transmission Control Protocol/Internet Protocol (TCP/IP)
technologies.

4. How does the Internet work?
The Internet works through a series of networks that connect
devices around the world through telephone lines. Users are
provided access to the Internet by Internet service providers. The
widespread use of mobile broadband and Wi-Fi in the 21st
century has allowed this connection to be wireless.

5. Types of the internet:-
Dialup connection: It is an old way of connecting to the internet. Dialup connection uses a phone line and
is very slow. You can either make a call on the phone or connect to the internet. The connection time is high
in dialup connection. The internet speed is also very slow. You cannot do video/audio chat on this type of
connection. Also downloading any file is very slow. Nowadays this type of connection is not used.
Leased line: Leased line is a dedicated phone line used to connect to the internet. A leased line is used by
big organizations. Some universities still use a leased line for making a connection to the internet.
ISDN (Integrated service digital network): In this type of internet you can connect a computer, fax
machine or telephone line to single ISDN. ISDN uses a modem to connect different devices. ISDN is costly
than Dialup connection. You can transfer video, audio, and other data at the same time i.e. you can make a
phone call from your telephone and also can use the internet at the same time.
DSL (Digital subscriber line): DSL uses the modem for making an internet connection. It is 10 times
faster than a dialup connection. Also, the voice quality of telephone is not affected when you use the
internet at the same time.
ADSL (Asymmetric digital subscriber line): It is mostly used type of DSL and in this type of connection,
download internet speed is high than upload internet speed. Mostly you use the internet for downloading
data. And we upload files less.
SDSL (Symmetric digital subscriber line): This is also a type of DSL but it has almost same download
and upload speed.

6. Uses of the Internet
• Some of the important usages of the internet are:
Online Businesses (E-commerce): Online shopping websites have made our life easier, e-commerce sites like
Amazon, Flipkart, Myntra are providing very spectacular services with just one click and this is a great use of
the Internet.
Cashless transactions: All the merchandising companies are offering services to their customers to pay the
bills of the products online via various digital payment apps like Paytm, Google pay, etc. UPI payment
gateway is also increasing day by day. Digital payment industries are growing at a rate of 50% every year too
because of the INTERNET.
Education: It is the internet facility that provides a whole bunch of educational material to everyone through
any server across the web. Those who are unable to attend physical classes can choose any course from the
internet and can have the point-to-point knowledge of it just by sitting at home. High-class faculties are
teaching online on digital platforms and providing quality education to students with the help of the Internet.
Social Networking: The purpose of social networking sites and apps is to connect people all over the world.
With the help of social networking sites, we can talk, share videos, images with our loved ones when they are
far away from us. Also, we can create groups for discussion or for meetings.
Entertainment: The Internet is also used for entertainment. There are numerous entertainment options
available on the internet like watching movies, playing games, listening to music, etc. You can also download
movies, games, songs, TV Serial, etc., easily from the internet.

7. Advantages and disadvantages of the internet
Advantage
 Online Banking and Transaction: The Internet allows us to transfer money
online by the net banking system. Money can be credited or Debited from one
account to the other.
 Education, online jobs, freelancing: Through the Internet, we are able to get
more jobs via online platforms like Linkedin and to reach more job providers.
Freelancing on the other hand has helped the youth to earn a side income and
the best part is all this can be done via INTERNET.
 Entertainment: There are numerous options of entertainment online we can
listen to music, play games can watch movies, web series, listening to
podcasts, youtube itself is a hub of knowledge as well as entertainment.
 New Job roles: The Internet has given us access to social media, and digital
products so we are having numerous new job opportunities like digital
marketing and social media marketing online businesses are earning huge
amounts of money just because the internet being the medium to help us to do
so.
 Best Communication Medium: The communication barrier has been
removed from the Internet. You can send messages via email, Whatsapp, and
Facebook. Voice chatting and video conferencing are also available to help
you to do important meetings online.
 Comfort to humans: Without putting any physical effort you can do so many
things like shopping online it can be anything from stationeries to clothes,
books to personal items, etc. You can books train and plane tickets online.
 GPS Tracking and google maps: Yet another advantage of the internet is
that you are able to find any road in any direction, areas with less traffic with
the help of GPS in your mobile.
Disadvantage
 Time wastage: Wasting too much time on the internet surfing on social
media apps and doing nothing decreases your productivity rather than
wasting time on scrolling social media apps one should utilize that time in
doing something skillful and even more productive.
 Bad impacts on health: Spending too much time on the internet causes
bad impacts on your health physical body needs some outdoor games
exercise and many more things. Looking at the screen for a longer
duration causes serious impacts on the eyes.
 Cyber Crimes: Cyberbullying, spam, viruses, hacking, and stealing data
are some of the crimes which are on the verge these days. Your system
which contains all the confidential data can be easily hacked by
cybercriminals.
 Effects on children: Small children are heavily addicted to the Internet
watching movies, games all the time is not good for their overall
personality as well as social development.
 Bullying and spreading negativity: The Internet has given a free tool in
the form of social media apps to all those people who always try to spread
negativity with very revolting and shameful messages and try to bully
each other which is wrong.