# 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 Answer Report Discuss 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. Click on Discuss to view users comments. Write your comments here:
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 Answer Report Discuss Option: A Explanation : Click on Discuss to view users comments. purushottam kmr said: (3:47pm on Saturday 11th March 2017) Residual error:-The probability that one or more errors will be undetected when an error detection scheme is used Write your comments here:
48:

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

 A. 15 B. 14 C. 12 D. 11 Answer Report Discuss Option: A Explanation : Click on Discuss to view users comments. Write your comments here:
49:

A field in the Ethernet message packet is

 A. Type B. data C. address D. none of these Answer Report Discuss Option: D Explanation : Click on Discuss to view users comments. Write your comments here:
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 Answer Report Discuss Option: B Explanation : Click on Discuss to view users comments. Write your comments here: