DEFINITION:-
     The types of physical system used to carry a communication signal from one system to another.

     TYPES:-
    i)Guided transmission media-send signals through cable or wire.
    ii)Unguided transmission media-send signal through air or space.

     TRANSMISSION MEDIA TERMS
 

TERMS	DEFINITION
Twisted-pair cable	A networking cable consisting of wire strands twisted in sets of two and bound into a cable
Coaxial Cable	A networking cable consisting of center wire inside a grounded, cylindrical shield,capable of sending data at high speeds.
Fiber-Optic Cable	A networking that utilizes hundreds of thin transparent fibers over which lasers transmits data as light.

     Example (wireless) :-
    Communication Sattelite,Broadcast radio,Cellular Radio,Infrared,Microwaves