PHYSICAL LAYER AND TRANSMISSION MEDIA
DATA AND SIGNALS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It is a digital encoding scheme that transmits 1s as zero voltages and 0s as positive voltages.
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Manchester Digital Encoding Schemes
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NonReturn to Zero Inverted (NRZI)
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4B/5B Digital Encoding Scheme
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NonReturn to Zero-Level (NRZ-L)
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Explanation:
Detailed explanation-1: -NRZ-I and NRZ-L – Both of these are kind of similar to the unipolar scheme of NRZ, but the difference is that in this case, we use two voltage/ amplitude levels. In the case of NRZ-Level (NRZ-L), the value of the bit gets determined by the level of the voltage.
Detailed explanation-2: -In Non-Return to zero Level, also abbreviated as NRZ-L, level of voltage determines the value of a bit. We take positive and negative voltages to represent bit 1 and 0 respectively. We shall have an example of data 11001100. The first bit is 1, and in relation to rule, bit 1 is represented by a positive voltage.
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