Network Security Interview MCQs

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Network Security Interview

What are the bits transmitted for the return to zero system?

A. 1001
B. 10110
C. 10010
D. 1101

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What are the bits transmitted in the differential Manchester coding?

A. 1101
B. 101100
C. 110010
D. 10011

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What are the bits transmitted for the AMI and Pseudoternary System?

A. 101101
B. 101100
C. 10010
D. None of the mentioned

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Five channels, each with a 100-kHz bandwidth, are to be multiplexed together. What is the minimum bandwidth of the link if there is a need for a guard band of 10 kHz between the channels to prevent interference?

A. 4600 khz
B. 500 khz
C. 540 khz
D. 580 khz

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Find the checksum byte for the fallowing data words: 10110011, 10101011, 01011010, 11010101

A. 10001101
B. 1110010
C. 10110101
D. 1110010

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Generate the CRC codeword for the message x3+1 using the generator polynomial x3+x+1.

A. 1001101
B. 1001001
C. 1001110
D. 1001111

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What is the hamming distance between these 2 codes: 10010010 and 11011001?

A. 3
B. 4
C. 6
D. 2

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What is the hamming code for the data: 1001101?

A. 10011100101
B. 11010000101
C. 10001100101
D. 11111001011

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10010100101 is the code received. Find the error bit.

A. 7
B. 5
C. 2
D. 3

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The channel capacity is 100Mbps, the frame length is 10000 bits and the arrival rate is 5000 frames/sec. Calculate the mean time delay.

A. 400 μsec
B. 20 msec
C. 2000 μsec
D. 200 μsec

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