MSCM 150
Thursday, February 25
The Internet I
1Wednesday, February 24, 2010
Unlike print and broadcast,
which rely on point-to-mass
communication, the Internet
is a network, where every
point can send or receive
communication.
2Wednesday, February 24, 2010
ARPANET
The Internet began as a project of the US Department of Defense
to provide high-speed data communications between military
contractors and research universities. The network was taken
over by the National Science Foundation in 1983, and opened to
public access.
3Wednesday, February 24, 2010
How It Works
•The Internet relies on
fiber optic systems,
which transmit
electromagnetic signals
as pulses of light.
•Each signal takes up the
same amount of capacity
in the fiber.
•More signals = more
demand for capacity.
4Wednesday, February 24, 2010
