Classical

Computer Networks - Data Communication & Network Security

46:  

Maximum data rate of a channel for a noiseless 3-kHz binary channel is

A.

3000 bps

B.

1500 bps

C.

6000 bps

D.

none of these 

 
 

Option: C

Explanation :

Maximum data rate = 2H log2 V bps,
where, H = bandwidth
             V = discrete levels
Here H is 3 kHz and V is 2.

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47:  

Which of the following measures the number of lost or garbled messages as a fraction of the total sent in the sampling period ?

A.

Residual error rate

B.

Transfer failure probability

C.

Connection release failure probability

D.

Connection establishment failure probability

 
 

Option: A

Explanation :

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purushottam kmr said: (12:47am on Sunday 12th March 2017)
Residual error:-The probability that one or more errors will be undetected when an error detection scheme is used

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48:  

Minimum number of bits required to represent all the symbols together is

A.

15

B.

14

C.

12

D.

11

 
 

Option: A

Explanation :

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49:  

A field in the Ethernet message packet is

A.

 Type

B.

data

C.

address

D.

none of these

 
 

Option: D

Explanation :

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50:  

If data rate of ring is 20 Mbps, signal propagation speed is 200 b/ms, then number of bits that can be placed on the channel of 200 km is

A.

2000 bits

B.

20,000 bits

C.

1,000 bits

D.

none of these

 
 

Option: B

Explanation :

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