Introduction to Internet

1. Presented by: Anubha

2. HISTORY OF INTERNET
STRUCTURE
&

3. 
CONTENTS
Brief history of the internet
The Creation of the Internet
Growth of internet hosts
The World Wide Web (WWW or W3)
Internet service provider’s (ISP’s)

4. 
 The largest network of networks in the world.
 Uses TCP/IP protocols and packet switching .
 Runs on any communications substrate.
What is internet?

5. 

6. 
 1968 - DARPA (Defense Advanced Research Projects
Agency) contracts with BBN (Bolt, Beranek & Newman)
to create ARPAnet
 1970 - First five nodes:
 UCLA
 Stanford
 UC Santa Barbara
 U of Utah, and
 BBN
 1974 - TCP specification by Vint Cerf
 1984 – On January 1, the Internet with its 1000 hosts
converts en masse to using TCP/IP for its messaging
Brief history of the internet

7. 
 ARPANET, with 40 nodes, goes public in 1972
 NCP, first host-to-host protocol, enables network
applications
 1972: Ray Tomlinson writes email program for ARPANET
 First computer to computer chat takes place between
Stanford and BBN
 1972: Telnet protocol RFC published
 1973: FTP protocol RFC published
Early 70s...

8. 
 ARPANET – Each node able to only talk to the other node on the
other end of wire
 First medium access control – ALOHANet by Norman Abramson
 1973-75: Bob Metcalfe's dissertation leads to the Ethernet protocol
 Medium access control protocol for wired networks based on
Abramson's ALOHA.
 Dissertation initially rejected by Harvard for not being
analytical enough, but won acceptance when a few more
equations were added!
Ethernet

9. 
“I came to work one day at MIT
and the computer had been
stolen, so I called DEC to
break the news to them that
this $30,000 computer that
they'd lent me was gone.
They thought this was the
greatest thing that ever
happened, because it turns
out that I had in my
possession the first computer
small enough to be stolen! “
- Robert Metcalfe
A little off topic...

10. 
Fathers of the Internet
At DARPA, Vinton Cerf and
Robert Kahn are working on an
architecture to create a
“network of networks” -
internetting!
Vinton Cerf and Robert Kahn

11. 
1969-1971

12.  The creation of the Internet solved the following
challenges:
 Basically inventing digital networking as we know
it
 Survivability of an infrastructure to send / receive
high-speed electronic messages
 Reliability of computer messaging
The Creation of the Internet

13. 
 1977: 111 hosts on Internet
 1981: 213 hosts
 1983: 562 hosts
 1984: 1,000 hosts
 1986: 5,000 hosts
 1987: 10,000 hosts
 1989: 100,000 hosts
 1992: 1,000,000 hosts
 2010: 2,023,202,974 hosts
 2012: 2,494,736,248 hosts
 2016: 3,424,971237 hosts
Growth of internet hosts

14. 
Internet Growth
The Internet may not be full, but it has grown at a phenomenal rate!

15. 

16.  is a collection of interconnected information that is
stored on computers all around the world.
 Most of the information on the World Wide Web is
stored in files that are formatted using Hypertext
Markup Language (HTML).
The World Wide Web
(WWW or W3)

17. 
 An Internet service provider (ISP) is a business that
provides connectivity to the Internet.
 To connect to the Internet, a computer needs a
physical connection to the ISP.
 Services Offered by an ISP Windows XP, Windows
2000, Windows 98, Windows 95, Windows Me,
Windows NT, Linux, and the Macintosh operating
system all support TCP/IP
Internet Service Providers
(ISPs)

18. 
Internet Intranet Extranet
It is a Global system of
interconnected
computer network.
It is a Private
networkspecific to an
organisation.
It is a Private network that uses public
network to share information with
suppliers and vendors.
Not regulated by any
authority.
It is regulated by an
organization.
It is regulated by multiple organization.
Thus content in the
network isaccessible to
everyoneconnected.
Thus content in the
network is
accessible only to
membersof
organization.
The content in the network is accessible to
members of organization & external
members with access to network.
It is largest in terms of
number of connected
devices.
It is small network with
minimal number of
connected devices.
The number of devices connected is
comparable with Intranet.
Difference between internet ,
intranet and extranet

19. 
Internet, intranet and extranet

20. 
 internet has been make easier to communicate with
other and very fast to receive the message.
 internet founder had perseverance and hard work
brought us to where we are today.
 Through this project we got lots of knowledge about
internet
Conclusion

21.  “Internet”
 https://en.wikipedia.org/wiki/Internet
 A Brief History of the Internet
 www.internetsociety.org/internet/...internet/histo
ry-internet/brief-history-.
 Structure
 https://www.eng.tau.ac.il/~shavitt/.../PrinComNe
t/2012/Internet-strct-12
Bibliography

22. 
THANK YOU