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| Bandwidth | Bandwidth is the range of signal frequency that can be sent over a given medium at the same time |
| Spectrum of a signal | is the range of frequencies that it contains |
| Communication | Signal contains a massage composed of data and information. |
| Telecommunication | Transmission of data from one device to another device in a different location |
| Data Communication | Electronic collection, processing, and distribution of data |
| Telecommunication Medium | Telecommunication Medium is anything that carries an electronic signal and interfaces between a sending device and a receiving device |
| Analog signal | An analog signal is a continuously varying electromagnetic wave that may be propagated over a variety of media, depending on spectrum |
| Digital signal | A digital signal is a sequence of voltage pulses that may be transmitted over a wire medium. |
| Guided media | With guided media, the wave are guided along a physical path |
| Unguided media | Unguided media provide a means for transmitting electromagnetic waves but do not guide them |
