Computer Hardware and Networking MCQ Quiz Hub

NETWORKING /PHYSICAL LAYER SET 4

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1. If signal does not change at all, its frequency is




2. A period of 100 ms in microseconds would be equals to




3. Analog data refers to information that is




4. We send a voice signal from a microphone to a recorder, the transmission is




5. The unit that is used to express the state of a signal is




6. The data rate depends upon




7. Bit rate is measured in




8. Periodic analog signals can be classified as




9. Digital data refers to the information that is




10. Conversion of digital signal to analog signal is




11. A sine wave is defined by




12. A digital signal is a composite analog signal with




13. Digital signals are represented in




14. In data communications, the non periodic signals




15. The term that refers to loss of strength of a signal is called




16. The value of the decibel is positive, if signal is




17. The term that describes the position of the waveform relative to time 0 is




18. Bit Rate is the number of bits sent in




19. In baseband transmission, the required bit rate is proportional to the




20. Change over a long span of time means




21. The propagation speed of electromagnetic signals depends on the




22. The transmission impairment that refers to a signal with high energy in a very short time is




23. Bit length can be defined in terms of




24. If a noiseless channel with a bandwidth of 3000 Hz transmitting a signal with two signal levels the maximum Bit rate would be




25. Sine wave can be represented by three parameters




26. The range of frequencies a channel can pass is called bandwidth in




27. When there is heavy traffic on the network, the queuing time is




28. The time required for a bit to travel from source to destination is




29. In data communications, we use periodic analog signals and




30. The range of frequencies contained in a composite signal is its




31. In real life, we cannot have a




32. A transmission media can have signal impairment because of




33. The bandwidth of a composite signal is the difference between the highest and




34. The relationship between amplitude and frequency can be represented by




35. Frequency is expressed in




36. Given the frequency 24Hz the corresponding period would be c. d.




37. The power in our house can be represented by




38. In induced noise, the impairment is created by sources like




39. Data to be transmitted must be transformed into




40. SNR stands for




41. SNR (signal to noise ratio) is equals to




42. One Picoseconds (PS) is equivalent to




43. We cannot send the digital signal directly to the channel, when the channel is




44. The difference in the delay of the signal may create a difference in




45. Signal to Noise Ratio is the ratio of the two




46. According to Fourier analysis, any composite signal is a combination of sine waves with




47. How many factors data rate limit depends on




48. If a periodic signal is decomposed into five sine waves with frequencies of 100, 300, 500, 700, and 900 Hz, what is its bandwidth?




49. Assume we need to download text documents at the rate of 100 pages per second. What is the required bit rate of the channel?




50. A digitized voice channel is made by digitizing a 4-kHz bandwidth analog voice signal. We need to sample the signal at twice the highest frequency (two samples per hertz). We assume that each sample requires 8 bits. What is the required bit rate?