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| 1 | |
Communication is the process of exchanging information. |
| | A) | True |
| | B) | False |
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| 2 | |
All electronic communication systems have a transmitter, a communication channel or medium, and an antenna. |
| | A) | True |
| | B) | False |
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| 3 | |
A receiver is a collection of electronic components and circuits that accepts the transmitted message from the channel and converts it to a form understandable to humans. |
| | A) | True |
| | B) | False |
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| 4 | |
Optical media communication channels are used for audio or video analog signals. |
| | A) | True |
| | B) | False |
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| 5 | |
Examples of transceivers include televisions, fax machines, cellular telephones, and computer modems. |
| | A) | True |
| | B) | False |
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| 6 | |
Simplex communication refers to a one-way transmission type system. |
| | A) | True |
| | B) | False |
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| 7 | |
A digital signal is a smoothly and continuously varying voltage or current. |
| | A) | True |
| | B) | False |
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| 8 | |
Modulation makes the information signal more compatible with the medium. |
| | A) | True |
| | B) | False |
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| 9 | |
Demodulation is the process of having a baseband voice, video, or digital signal modify another, higher-frequency signal, the carrier. |
| | A) | True |
| | B) | False |
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| 10 | |
A modem can be used to translate data from digital to analog only. |
| | A) | True |
| | B) | False |
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| 11 | |
De-multiplexing is the process of allowing two or more signals to share the same medium or channel. |
| | A) | True |
| | B) | False |
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| 12 | |
The range of electromagnetic signals encompassing all frequencies is referred to as the electromagnetic spectrum. |
| | A) | True |
| | B) | False |
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| 13 | |
Wavelength is the distance occupied by two cycles of a wave. |
| | A) | True |
| | B) | False |
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| 14 | |
The wavelength of a signal is calculated by dividing the speed of light by the frequency of the wave. |
| | A) | True |
| | B) | False |
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| 15 | |
Low frequencies are in the 30- to 300-KHz range. |
| | A) | True |
| | B) | False |
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| 16 | |
In electronic communication systems, the message is referred to as parity. |
| | A) | True |
| | B) | False |
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| 17 | |
The communication channel is the medium by which the electronic signal is sent from place to place. |
| | A) | True |
| | B) | False |
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| 18 | |
A receiver is a collection of electronic components and circuits that accepts the transmitted message from the channel and converts is back to a form understandable by humans. |
| | A) | True |
| | B) | False |
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| 19 | |
Analog signals vary continuously. |
| | A) | True |
| | B) | False |
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| 20 | |
Modulation allows more than one signal to be transmitted concurrently over a single medium. |
| | A) | True |
| | B) | False |
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