it is group presenting. Nalin sinha.

7. HISTORY OF INTERNET
• In 1969,a network evolved out an experiment done by the
defence agency of united states.
• The department of US defence was in a process of doing
research and technical development in the areas where some
of the services of defence(Army,Navy,Air force,Marine
corps)had clear jurisdiction of operation.
• This agency i.e,ARPA(Advanced Research Agency),which was
later known as DARPA(Defence Advanced Research Project
Agency),planned to create a computer network that would
continue to operate even during the emergency or disastrous .

8. • By 1970’s, ARPA helped in the development of a new
protocol known as TCP/IP (Transmission Control
Protocol /Internet Protocol ) for transferring and
tracking of data between the networks so that they can
reach their destination safely.
• By 1980’s, another federal agency of US named as
National Science Foundation (NSF) used ARPANET to
connect its five regional supercomputer centres located
at different universities so that their multiple users could
share the resources among themselves. Later, NSF
created a more sophisticated network called NSFNET
(National Science Foundation Network ) which was a
series of network utilized for research and development.

9. • The Internet is a worldwide collection of
computer networks
• The Internet is a network of networks
that connects users in every country in
the world. There are currently over one
billion Internet user worldwide.

10. • Looking for jobs or online jobs opportunities.
• Online shopping, Booking ticket’s etc.
• Allow easy and quick access to information.
• Job interview.
• 24×7 availability.
• Entertainment.
• Read online books.

11. • Accounting hacking chances.
• Wronged fake news.
• Wasting time.
• Health disadvantage.
• Far from family.
• It effect our daily rutting.

12. • Most people work in a network environment
• A computer network is define as group of two
or more computer system link together.
• A computer network is an interconnection of
two or more computer that are able to
exchange information.
• The computer may be connected via any data
communication link.

14. • Lan is a network widely used for local
communication.
• They are private own network with a purpose
to share resources and to exchange
information.
• The computer is a LAN are generally
connected using cable & if it based on Wi-Fi
then it is known as WLAN(wireless local area
network).

16. • A type of network which can covered and
infincity,collage campus or small resin.
• Man also connect several LAN spread up city.
• Cables television network is an example of
MAN.
• It also refereed as Lan.

18. • WAN is the network that connects computer
over large distances.
• WAN is uses telephone line, optical fibber,
satellite links and radio links to connect.
• Internet is a common example of WAN.