Q. Shannon capacity formula for noisy channel is
✅ Correct Answer: (C)
C = B Log (1 + SNR)
Data Communication and Networking MCQs and Notes
Q. 1 TeraHertz =
✅ Correct Answer: (C)
1000000000000 Hz
Q. OSI model defines an open system as
✅ Correct Answer: (A)
a set of protocols that allows any two different systems to communicate
Q. Differential Manchester and multi line transmission (MLT-3) schemes differ in
✅ Correct Answer: (C)
Both a and b
Q. The frequency of the modulated signal is constant for the duration of one signal element, but changes for the next signal element if the data element changes. Both peak amplitude and phase remain constant for all signal elements. This is
✅ Correct Answer: (B)
FSK
Q. Analog to digital conversion can be done using
✅ Correct Answer: (C)
Both a and b
Q. NRZ L and NRZ I differ in
✅ Correct Answer: (C)
Both a and b
Q. If r is the number of data elements carried per signal element, N is the data rate, and S is the signal rate, then
✅ Correct Answer: (B)
S = N/r
Q. Attenuation means
✅ Correct Answer: (A)
loss of energy