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11. The number of cross point needed for 10 lines in a cross point switch which is full duplex in nature and there are no self connection is
Solution:
As all lines are full-duplex and there are no self connections, only the cross points above the diagonals are needed. Hence formula for the number of cross points required is n(n-1)/2.
12. A terminal multiplexer has six 1200 bps terminals and 'n' 300bps terminals connected to it. The outgoing line is 9600bps. What is the maximum value of n?
Solution:
Since there are six 1200bps terminals, 6*1200 + n*300 =9600 by solving this, n=8.
13. Maximum data rate of a channel for a noiseless 3-kHz binary channel is
So, data rate = 2*3000 log22 bps = 6000 bps.
Solution:
Maximum data rate = 2Hlog2V bps, where H is the bandwidth, V is the discrete levels. Here H is 3 kHz and V is 2.So, data rate = 2*3000 log22 bps = 6000 bps.
14. The ________ measures the number of lost or garbled messages as a fraction of the total sent in the sampling period.
15. In session layer, during data transfer, the data stream responsible for the control" purpose (i.e control of the session layer itself) is"
17. Which of the following ISO level is more closely related to the physical communications facilities?
19. The Network topology that supports bi-directional links between each possible node is
Solution:
A mesh network is a local area network topology in which the infrastructure nodes connect directly, dynamically and non-hierarchically to as many other nodes as possible and cooperate with one another to efficiently route data to and from clients.