TDL_3.1_3.2

With ____, the waves are guided along a physical path; examples of guided media are twisted pair, coaxial cable, and optical fiber.

____, also called ____, provide a means for transmitting electromagnetic waves but do not guide them; examples are propagation through air, vacuum, and seawater.

The term ____ is used to refer to the transmission path between two devices in which signals propagate directly from transmitter to receiver with no intermediate devices, other than amplifiers or repeaters used to increase signal strength. Note that this term can apply to both guided and unguided media.

A guided transmission medium is ____ if it provides a direct link between two devices and those are the only two devices sharing the medium.

In a _____ guided configuration, more than two devices share the same medium.

In _____ transmission, signals are transmitted in only one direction; one station is transmitter and the other is receiver

In ______ operation, both stations may transmit, but only one at a time.

In ______ operation, both stations may transmit simultaneously. In the latter case, the medium is carrying signals in both directions at the same time.

It turns out that the ______ view of a signal is more important to an understanding of data transmission than a _____ view.

An ______ is one in which the signal intensity varies in a smooth fashion over time.