KERALA UNIVERSITY Class 4 data communication Question Paper 2019

Practice authentic previous year questions for better exam preparation.

Sample Questions

Consider a point-to-point link 50 km in length. At what bandwidth would propagation delay (at a speed of $2 \times 10^{8} \mathrm{~m} / \mathrm{s}$ ) equal transmit delay for 100-byte packets? What about 512-byte packets?
How does sky propagation differ from line-of-sight propagation? State the features of the wireless transmission medium that is very useful for unicast data communication?
What SNR ratio is required to achieve a bandwidth efficiency of 1.0 for ASK, FSK, PSK, and QPSK? Assume that the required bit error rate is $10^{6}$.
A bit stream 10011101 is transmitted using the standard CRC method. The generator polynomial is $x^{3}+1$. Show the actual bit string transmitted. Suppose the third bit from the left is inverted during transmission, show how this error is detected at...
What are the main benefits of spread spectrum system? State how DSSS system benefits from multipath propagation? ( $\mathbf{5} \boldsymbol{\times} \mathbf{4} \boldsymbol{=} \mathbf{2 0}$ Marks) P.T.O. Answer one question from each Module. Each quest...