Classical

Computer Networks - Data Communication & Network Security

56:  

Adaptive or dynamic directory used in packet routing changes

A.

within each user session

B.

with each user session

C.

at system generation time only

D.

none of these

 
 

Option: A

Explanation :


57:  

Differential Manchester code for the given figure is 

manchester code

A.

111100101

B.

100010111

C.

101001111

D.

101001101

 
 

Option: B

Explanation :


58:  

Maximum data rate of a channel of 3000 Hz bandwidth and SNR of 30 dB is

A.

75,000 bps

B.

60,000 bps

C.

30,000 bps

D.

3,000 bps

 
 

Option: C

Explanation :

Maximum number of bps = Hlog2 (1 + SNR).


59:  

Minimum number of bits required to represent B is

A.

1

B.

2

C.

3

D.

4

 
 

Option: C

Explanation :


60:  

A 3000 Hz bandwidth noisy channel transmits bits with a signal to thermal noise ratio of 30 dB. What is the maximum data rate of the channel ?

A.

30 kbps

B.

00 kbps

C.

60 kbps

D.

none of these

 
 

Option: A

Explanation :




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