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A modem, short for modulator-demodulator...View Answer
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A) multiplexing/demultiplexing
B) more/demote
C) Mode-M technique
D) modulator/demodulator
E) Mod emulation technique
G) C) and E)
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B) False
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B) False
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B) False
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A) submarine cables
B) satellites
C) telephone lines
D) boats
E) modems
G) A) and C)
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A) physical
B) transport
C) application
D) terminal
E) data link
G) D) and E)
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B) False
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False
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A) Manchester encoding
B) Unipolar signaling
C) Bipolar return to zero signaling
D) Bipolar nonreturn to zero signaling
E) Manchester return to zero signaling
G) B) and E)
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A) frequency
B) bandwidth
C) phase
D) amplitude
E) loudness
G) B) and C)
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B) False
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B) False
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A) phase
B) attenuation
C) bipolar
D) bandwidth
E) codec
G) A) and D)
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Digital data refers to information that is stored or transmitted in the form of discrete signals, typically represented as binary code (0s and 1s). This can include text, images, audio, video, and any other type of information that can be represented digitally.
Most networks are now digital because digital transmission offers several advantages over analog transmission. Firstly, digital signals are less susceptible to noise and interference, which means that they can be transmitted over longer distances without degradation. Additionally, digital data can be easily compressed and manipulated, allowing for more efficient storage and transmission. Digital networks also have the ability to multiplex multiple signals onto a single transmission line, increasing the overall capacity and efficiency of the network. Furthermore, digital data can be easily encrypted and secured, providing a higher level of data protection. Finally, digital networks are more compatible with modern computing and communication technologies, making them more versatile and adaptable to changing needs.
Digital transmission is superior to analog for several reasons. Firstly, digital signals can be easily regenerated and amplified without loss of quality, whereas analog signals degrade over distance and require more complex and expensive equipment for regeneration. Secondly, digital signals can be easily manipulated and processed using digital signal processing techniques, allowing for more advanced error correction and data recovery. Thirdly, digital transmission allows for more efficient use of bandwidth, as multiple digital signals can be multiplexed onto a single transmission line. Additionally, digital data can be easily encrypted and secured, providing a higher level of data protection. Finally, digital networks are more compatible with modern computing and communication technologies, making them more versatile and adaptable to changing needs.
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When deciding between a Time Division Mu...View Answer
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Analog data and digital data represent t...View Answer
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A) analog
B) dedicated
C) point-to-point
D) shared
E) simplex
G) C) and E)
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A) the longer the distance of a telephone wire between sender and recipient, the lower the bandwidth across that wire
B) the shorter the distance of a telephone wire between sender and recipient, the lower the bandwidth across that wire
C) bandwidth is constant across any wire, therefore distance is not relevant to its capacity
D) the longer the distance of a telephone wire between sender and recipient, the higher the bandwidth across that wire
E) bandwidth is not a term that can be used when discussing telephone transmissions
G) C) and E)
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A) shielded twisted pair
B) unshielded twisted pair
C) Cat 5 twisted pair
D) coaxial cable
E) fiber optic cable
G) A) and E)
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E
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B) False
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