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Quiz 3: Data Communication and Networking, Exercises of Data Communication Systems and Computer Networks
A 20-minute long quiz on data communication and networking, covering topics such as spread spectrum, error detection, parity bits, and efficiency in stop-and-wait protocol. Questions include reasoning behind the use of spread spectrum, the difference between lrc and vrc in error detection, and the impact of parity bits on message reception.
Typology: Exercises
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BET 7B
Max Marks = 15 Time Allowed = 20 mins
Quiz 3
Q1: What are the main reasons for “Spread Spectrum”? (2) Q2: Why would you expect LRC to detect more errors than VRC bit? (2) Q3: Would you expect that the inclusion of a parity bit with each character would change the probability of receiving a correct message? (3) Q4: A channel has a data rate of 4 kbps and a propagation delay of 20 ms. For what range of frame sizes does stop-and-wait give an efficiency of at least 50%? (5) Q5: What is the Hamming Distance between the following code words (3) V1 = 0011011010 V2 = 0101010101