Beginnings of the Internet
Computers Learned to Talk to Each Other
When computers were
developed in the 1950’s they did not talk to each other. This all changed
APRANET was a large-area
network created by the US Defense Advanced Research Project Agency (ARPA).
On Labor Day, 1969, the
first message was sent via telephone lines from one computer at UCLA to another
computer at Stanford.
This was the beginning
of the internet.
– The computer that
is sending the information
– The computer
receiving the message
The media that carries
or transports the message (phone wire, coaxial cable, fiber or microwave)
The rules that govern
the transfer of data.
A network is a
group of two or more computers linked together via communication devices.
Computers on a network
are called nodes or clients.
Computers that allocate
or distribute resources are called servers.
Development of the Internet
Although no one person
can claim to have started the internet, the early origins can be traced back to
that first message sent from UCLA to Stanford via the ARPANET.
Over the years, the internet has grown from just a network to allow scientists
to share information on military and scientific research.
1972 - email
1989, more than 100,000
host computers were attached to ARPANET
1990, ARPANET ceased to
became known as the Internet
1992 - World Wide Web
came into being
1993 World’s first
browser, Mosaic was released. Browsers provide a graphical interface for the Internet.
All brands and models of
computers can work on the internet due to interpolarity.
Computers on the
internet communicate with each other using a set of protocols called TCP/IP
Protocol and Internet Protocol (TCP/IP)
Protocol is a standard format for trasmitting data.
How They Talk
TCP/IP allows two
computers to connect and exchange information
A host computer allows
you to access the information it contains.
By typing in a specific
address, you are able to connect to the computer.
The TCP/IP takes over
and establishes a connection to the other computer.
Similar to putting an
address on a letter and having the Post Office deliver it to the right address.
The Web vs. the Net
History of Computers