Which of the following statements are CORRECT?
(A) NRZ is a bipolar scheme in which a positive voltage defines bit 0.
(B) NRZ-L and NRZ-I both have an average signal rate of N/2.
(C) The ideas of RZ and NRZ-L are combined in the Manchester scheme.
(D) NRZ-L and NRZ-I both have DC component problems.
(E) The minimum bandwidth of Manchester and differential Manchester is 3 times that of NRZ.
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Correct answer: C. (B), (C) and (D) Only
Explanation
Per Forouzan, NRZ-L/NRZ-I have average signal rate N/2 and suffer DC components, and Manchester combines RZ and NRZ-L. Manchester needs twice (not 3 times) NRZ's bandwidth, and NRZ is a polar (not bipolar) scheme.More Data Communication and Computer Networks questions
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