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Question
_______ is a section in a DNS message.A) Header
B) Question
C) Authority
D) All of the above
Answer
This answer is hidden. It contains 1 characters.
Related questions
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A) transmitter
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A) single mode and the multimode
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A means of transmitting analog signals without regard to their content is ________ transmission.
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The simplest sort of signal is a ________ signal, in which the same signal pattern repeats over time.
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A) Voice
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A) digital
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A) multipoint
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Delay distortion occurs because the velocity of propagation of a signal through a guided medium varies with frequency.
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An analog signal can be transmitted only a limited distance before attenuation, noise, and other impairments endanger the integrityof the data.
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A familiar example of analog data is audio, which, in the form of acoustic sound waves, can be perceived directly by human beings.
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A) parallel
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C) analog
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A ________ error can occur in the presence of white noise when a slight random deterioration of the signal to noise ratio is sufficient to confuse the receiver's decision of a single bit.
A) burst
B) idle
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________ is one of the most fundamental requirements in the transmission of a stream of bits from one device to another.
A) Standardization
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The ratio of data bits to total bits is called the code rate .
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In an __________ , there is a cluster of bits in which a number of errors occur, although not necessarily all of the bits in the cluster suffer an error.
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In the differential ________ scheme a binary 0 is represented by sending a signal burst of the same phase as the previous signal burst sent. A binary 1 is represented by sending a signal burst of opposite phase to the preceding one.
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In ________ the phase of the carrier signal is shifted to represent data.
A) MFSK
B) ASK
C) FSK
D) PSK
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Because of their simplicity and relatively low frequency response characteristics, ________ codes are commonly used for digital magnetic recording.
A) NRZ
B) AMI
C) VSES
D) B8ZS