Download - Internet and its working (manu)
INTERNET & IT’S WORKING
MANU NAIRROLL NO: 23
MBA(FT), SEM: 1SMS, CUSAT
CONTENTS
• Introduction• What is Internet• Origin of Internet• Evolution of Internet• Internet and its working• Advantages• Disadvantages • Future• Conclusion
WHAT IS A NETWORK?
A large number of separate but interconnected computers forms a network.
Three Types: LAN (Local Area Network)MAN(Metropolitan Area Network)WAN(Wide Area Network)
WHAT IS INTERNET?
A collection of interconnected networks forms INTERNET.
The internet as we know today is actually a very large wide area network (WAN) connecting computers and networks around the world.
Internet makes it possible for millions of computer users to connect to one another via telephone line, cables and satellites.
ORIGIN OF INTERNET
Internet was born in late 1960s.
Advanced Research Project Agency (ARPA) or US Department of Defence linked together mainframe computers
to form a communication network known as ARPANET
AGENCY’S MAIN OBJECTIVES
The design was built around reliability and redundancy so as to allow communication to continue between major nodes in case of attacks (nuclear attacks) or natural disaster.
To make local resource available to any computer (however remote) in net in such a way that any program available to local users can be used remotely without degradation.
EVOLUTION OF INTERNET
1950:Development of Computers.
1960 & Early 1970:Packet switching networks (like ARPANET) were developed using variety of protocols. ARPANET led to the development of protocols of internetworking. Note: Internetworking is the process of linking collection of network)
EVOLUTION contd…
1981:Access to ARPANET was expanded
when National Science Foundation (NSF) created a new high speed network.
Objectives:To interconnect supercomputing centres
so they could access one another’s resources.
To give academic and research centres access to one another for purpose of exchanging information.
EVOLUTION contd…
1982:The Internet Protocol Suite (TCP/IP) was standardised and concept of world wide network of fully interconnected TCP/IP network called internet was introduced.
1990:ARPANET was decommissioned since speed was no longer sufficient . NSFNET fully replaced ARPANET.
EVOLUTION contd…
1995:NSFNET was decommissioned and Internet got commercialised.
INTERNET
SERVER
SERVER
STORED
Securitycatalyst.com67.205.46.248
Google.com72.14.205.100
Facebook.com69.63.176.140
Yahoo.com216.27.69.178
IP ADDRESS
INTERNET SERVICE
PROVIDER
Gmail.com
aol.com(Server and ISP)
Client
DSL
INTERNET SERVICE
PROVIDER
Gmail.com
aol.com(Server and ISP)
Client
DSL
ASWIN
ASWIN
I S P
Facebook.com69.63.178.11
Marketresearch.com209.190.222.100
PAUL192.16.22.11
BOSS192.16.22.15
I S P
Facebook.com69.63.178.11
Marketresearch.com209.190.222.100
PAUL192.16.22.11
BOSS192.16.22.15
ADVANTAGES
Communication
Information
Entertainment
Services
E-Commerce
DISADVANTAGES
Hacking
Spamming
Spoofing
Phishing
Virus threat
FUTURE OF INTERNET !!!
Globalism
Virtual reality
Bandwidth
Wireless
Grids
Integration
CONCLUSION
Internet has become a very important part of our life. It is impossible to think a world without computers because our day to day activities are dependent on it. So it is necessary to know how internet works.
REFERENCES
Andrew S. Tanenbaum, Computer Networks, 4th Edition, Pearson Education.
Video by Aaron Titus, Securitycatalyst.com.
Wikipedia