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Computer Networks: Digital Transmission MCQs
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Computer Networks: Digital Transmission MCQs
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25 Questions

1. In bipolar encoding, we use three levels: positive, zero and
2. A system is using NRZ-I to transfer 10-Mbps data. What would be minimum bandwidth?
3. Asynchronous, synchronous and isochronous are three subclasses of serial transmission to send
4. The idea of Return to Zero (RZ) and Non Return to Zero-Level (NRZ-L) are combined into the
5. Line coding, block coding and scrambling are the techniques of converting the
6. Signal rate is also called the
7. The change or lack of change in the level of the voltage determines the value of the bit is known as
8. The minimum bandwidth of the digital signal is nb times greater than the bandwidth of the
9. In alternate mark inversion, mark means
10. In which scheme all the signal levels are on one side of the time axis?
11. In 8B6T, the minimum bandwidth is very close to
12. A term that refers to a code that is generated to detect some or all of errors occurred during transmission is
13. A telephone line cannot pass frequencies below
14. What would be the minimum bandwidth of Manchester and differential Manchester?
15. The most common technique to change an analog signal to digital data is called
16. The average signal rate of 2BlQ is
17. Baseline wandering is prevented by the
18. The term that means data is sent over four wires at the same time is
19. The block coding scheme that provides greater error detection capability than 4B/5B is
20. What is the number of bits per baud for PSK with four different phases?
21. If the delta is positive, the modulator process records
22. In OOOVBOVB, V stands for violation and B stands for
23. In the adaptive delta modulation, for better performance, the value of delta is
24. B8ZS substitutes eight consecutive zeros with
25. In NRZ-I the inversion or the lack of inversion determines the

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