PHYSICAL LAYER AND TRANSMISSION MEDIA
DIGITAL TRANSMISSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Data rate ; signal rate
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Signal rate ; data rate
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Either A or B
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None of the above
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Detailed explanation-1: -The data rate defines the number of data elements (bits) sent in 1s. The unit is bits per second (bps). The signal rate is the number of signal elements sent in 1s.
Detailed explanation-2: -Bit rate is a measure of the number of data bits (that’s 0’s and 1’s) transmitted in one second. A figure of 2400 bits per second means 2400 zeros or ones can be transmitted in one second, hence the abbreviation ‘bps’.
Detailed explanation-3: -An analog signal carries 4 bits per signal element.
Detailed explanation-4: -Network bandwidth is a measurement indicating the maximum capacity of a wired or wireless communications link to transmit data over a network connection in a given amount of time. Typically, bandwidth is represented in the number of bits, kilobits, megabits or gigabits that can be transmitted in 1 second.