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26 Cards in this Set
- Front
- Back
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________ is the combination of previously separate technologies.
Convergence Natural user interface Accelerometer Facial recognition |
Convergence
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A pair of frequencies is called a ________.
tower SID channel cell |
channel
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Which of the following is NOT an advantage of using digital signals to communicate?
It is easier to correct for attenuation. Errors can be detected and corrected. Digital signals can be compressed and decompressed. The accuracy depends on the sampling rate. |
The accuracy depends on the sampling rate.
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Frequencies of EM waves are often measured in ________, which is the equivalent of one thousand cycles per second.
kilohertz gigahertz megahertz hertz |
kilohertz
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process of making a signal stronger
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amplify
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the result when a signal does not reach a tower
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dropped call
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wire that can create EM waves by moving electric charges back and forth
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antenna
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receiver that allows checking of different frequencies
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scanner
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a pair of frequencies that allow for talking and listening at the same time
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channel
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HDTV can be connected to digital devices with a high-speed connection that does not require compression called ________. (1 point) VGI
HD DVI HDMI |
HDMI
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A(n) ________ converts the flashes of light back into two voltages that can be used by a computer.
electromagnetic wave photo detector laser diode repeater |
photo detector
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Cell phone service providers are all assigned a ________ by the FCC.
MTSO ESN MIN SID |
SID
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Which of the following represent appropriate steps to protecting data? (1 point)
restrict use to authorized persons for approved purposes decript sensitive data protect passwords or other codes both A & B |
both A & B
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When a signal travels through glass or air, it loses some of its energy and becomes ________. (1 point)
digital attenuated processed repeated |
attenuated
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newer television broadcast of digital images with more lines of pixels
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HDTV
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uses digital signals sent from handheld input devices to the computer
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D V R
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dominant new standard for recording HD video
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Blu-ray disc
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dominant new standard for recording HD video
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digital audio system
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uses digital signals sent from handheld input devices to the computer
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interactive game player
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Traditional telephones were based upon ________ communications. (1 point)
binary digital transistor analog |
cf
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Traditional telephones were based upon ________ communications. (1 point)
binary digital transistor analog |
analog
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Which of the following represent threats to data? (1 point)
it can be stolen and removed from your possession it can be copied without your knowledge some of it can be destroyed or altered subtly all of the above |
all of the above
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A digital radio receiver can separate the digital component and play it instead of the analog component. This method is called ________. (1 point)
in-band on-channel frequency modulation amplitude modulation none of the above |
in-band on-channel
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The rate at which a series of images is replaced on a computer monitor is referred to as ________. (1 point)
sampling rate true color megapixel refresh rate |
refresh rate
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A mobile phone designed to work with towers is known as a ________. (1 point)
channel cell tower phone cell phone |
cell phone
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The level of recording which includes all of the colors humans can perceive is called ________. (1 point)
resolution true color photo detector progressive |
true color
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