Transcript The Internet

ITGS – The Internet and WWW
History
In the 1960s:
• Computers couldn’t communicate with
each other
• Data moved from one computer to
another by carrying or mailing magnetic
tape or punched cards.
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ITGS – The Internet and WWW
History
Why computer scientists made the first
network?
• The main idea was to enable
researchers to share computing
resources and ideas.
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ITGS – The Internet and WWW
History
What vision of the first network was U.S.
military strategists?
• They wanted a network that could
function even if some connections were
destroyed.
• U.S. provided 1 million $ for scientists
and engineers to build a small
experimental network
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ITGS – The Internet and WWW
History - ARPANET
The first network was ARPANET in
1969.
The first historic message form UCLA to
Doug Engelbart’s lab at the Stanford
Research Institute.
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ITGS – The Internet and WWW
History - ARPANET
ARPANET:
• A network was unreliable
• All computers were equal in their ability
to communicate with other network
computers.
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ITGS – The Internet and WWW
History – ARPANET - Packet
ARPANET - Packet:
• Messages were contained in software
packets that could travel independently
by any number of different paths.
• Packets could pass through all kind of
computers.
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ITGS – The Internet and WWW
History – ARPANET - Protocol
ARPANET - Protocol :
• At the beginning it was peer-to-peer
network.
• 1980s was developed the protocols as
a standard computer language.
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ITGS – The Internet and WWW
Internet
The Internet is:
• a technology, a tool, and a culture.
• adding new features.
• at the beginning computer scientists,
now all professions.
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ITGS – The Internet and WWW
Inside the Internet
The Internet
• Number of networks,
• is not controlled by any one
government, corporation, individual, or
legal system.
• Several international organizations
develop standards and protocols, but no
one has the power to control the Net’s
operation or evolution
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ITGS – The Internet and WWW
Counting Connections
It’s impossible to pin down the exact
size of the Internet
• growing too fast,
• is decentralized,
• doesn’t have hard boundaries.
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ITGS – The Internet and WWW
Inside the Internet
The Internet
• DNS domain name system.
• General categories of top-level
domains
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ITGS – The Internet and WWW
Internet Protocols
The Internet
• TCP/IP Transmission Control
Protocol/Internet Protocol;
It was developed as an experiment in
internetworking, connecting different
types of networks and computer
systems.
• TCP/IP became “language” of the
Internet.
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ITGS – The Internet and WWW
Inside the Internet
The Internet
• DNS domain name system.
• General categories of top-level
domains
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ITGS – The Internet and WWW
Iet
Fitness center:
• Fitness center + internet club
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