1. Telephone
1. 2.
3. 4.
5.
Metal or
Optical-fiber cables Microwave towers
Is used to
transmit a
Which can be
either digital or
Over long distances
and can be sent
By either
Which uses
Or by
Which uses
And orbiting
A. Physical
transmission
B. Signal
C. Satellites
D. Analog
E. Atmospheric
transmission
B D
A E
C