• The Internet is a global network connecting millons of computers.

• It´s a tool.• The number of Internet users

represents nearly 40% of the world´s population.7,200 millons 40% = 3,037 millons

The origins of the Internet

This marvelous tool holds its roots in the cold war

• United States • Soviet Union

A need was realized to connect the top universities of the United States

• 1958. Four computers were first connected in the original ARPA (Advanced Research Projects Agency).

• ARPA protected the flow of information between military installations by creating a network geographically.

The four computers were located in the respective computer research

labs of:

• Stanford

• UC Santa Barbara

• University of Utah

• UCLA

protected the flow of information between military installations by creating a network geographically separated computers that could exchange information.

Raymond Samuel Tomlinson

“Ray”

• He is a US programmer.• He implemented an

email system in 1971.• He is responsible of the

@ sign.

Joseph Carl Robnett Licklider

J. C. R. “Lick”

• He was an American psychologist and computer scientist.

• He formulated the earliest ideas of global networking in 1962.

Internet Pionners

• Vinton Gray Cerf

“Vin”

• Robert Elliot Kahn

“Bob”

• He is an American engineer.• He is the co-designer of the

TCP/IP protocols in 1978.

• He is an American electrical engineer.

• He invented the TCP/IP, the fundamental communication at the heart of the Internet.

• Timothy John Berners-Lee “Tim” “TimBL”

• He is an English computer scientist.• He is the inventor of the World Wide Web. (WWW) in

1989.• He implemented the first successful communication a

Hypertext Transfer Protocol (HTTP).• He invented the URLs (Universal Resource Locators)

between 1989 - 1991

Web Browsers

• People communicate over the internet in a number of ways .

• Using the Web Browser, you have access to billions of pages of information.

A Computer Virus• It is a malware program, when executed,

replicates by inserting copies of itself (possibly modified) into other computer programs.

Anti-Virus Software• It is a program or set of programs that are

designed to prevent, search for, detect and remove software viruses, and other malicious sofware.

Don’t confuse World Wide Web (WWW)

• It consists of the interlinked collection of the information and documents.

• It´s necessary to use hypertext to access the various forms of information avaliable on the world’s network.

Internet• It is the network of the

several computers which are connected through the linkage of the accesories like copper wires or wireless.

Tha

nks