Q5: A periodic signal has a bandwidth of 20 Hz. The highest frequency is 60 Hz. What is the lowest frequency? Draw the spectrum if the signal contains all frequencies of the same amplitude. Q6: Discuss Data Rate Limits and its factors.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Q4: What is the total delay (latency) for a frame of size 6 million bits that is being sent on a link with 5
routers each having a queuing time of 5 us and a processing time of 2 us. The length of the link is 3000
Km. The speed of light inside the link is 2 x 10^8 m/s. The link has a bandwidth of 10 Mbps. Which
component of the total delay is dominant? Which one is negligible?
Q5: A periodic signal has a bandwidth of 20 Hz. The highest frequency is 60 Hz. What is the lowest
frequency? Draw the spectrum if the signal contains all frequencies of the same amplitude.
Q6: Discuss Data Rate Limits and its factors.
Q7: Discuss the difference between Attenuation and Distortion.
Q8: A signal with 200 milliwatts power passes through 10 devices, each with an average noise of 2
microwatts. What is the SNR? What is the SNRdB?
Q9: What is the bit rate for each of the following signals?
a. A signal in which 1 bit lasts 0.001 s
b. A signal in which 1 bit lasts 2 ms
c. A signal in which 10 bits last 20 µs
Q10: Between a high SNR and a low SNR, which one is more desirable? Explain the reason.
Transcribed Image Text:Q4: What is the total delay (latency) for a frame of size 6 million bits that is being sent on a link with 5 routers each having a queuing time of 5 us and a processing time of 2 us. The length of the link is 3000 Km. The speed of light inside the link is 2 x 10^8 m/s. The link has a bandwidth of 10 Mbps. Which component of the total delay is dominant? Which one is negligible? Q5: A periodic signal has a bandwidth of 20 Hz. The highest frequency is 60 Hz. What is the lowest frequency? Draw the spectrum if the signal contains all frequencies of the same amplitude. Q6: Discuss Data Rate Limits and its factors. Q7: Discuss the difference between Attenuation and Distortion. Q8: A signal with 200 milliwatts power passes through 10 devices, each with an average noise of 2 microwatts. What is the SNR? What is the SNRdB? Q9: What is the bit rate for each of the following signals? a. A signal in which 1 bit lasts 0.001 s b. A signal in which 1 bit lasts 2 ms c. A signal in which 10 bits last 20 µs Q10: Between a high SNR and a low SNR, which one is more desirable? Explain the reason.
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