DATA COMMUNICATION & NETWORK LAB
Unit -1 - Consider a PCM system in which 24 signals are to be time-multiplexed. Each signal has a bandwidth from 400 to 3.4 KHz the sampling rate is 33.33% higher than the theoretical minimum, and 8 bits are used for each sample. Determine the output bit rate.
Unit -2 - A very heavily loaded 1-km-long 10-Mbps token ring has a propagation speed of 200m/ usec. Fifty stations are uniformly spaced around the ring. Data frames and are thus included as spare bits within the data frames and are effectively free. The token is 8 bits. Calculate the effective data rate of the ring.
Unit -3 - Explain the steps involved in computing the checksum for a given message frame and hence find the complete frame bit pattern for the data given below: Data polynomial D(x) = 1101011011 Generator polynomial G(x) = x4 + x + 1
Unit -4 - Write a program to simulate the operation of a token ring with no priorities. Take into account the walk time between stations and the time required to drain the ring before regenerating the token. Now change the simulator to allow stations to regenerate the token as soon as they are done transmitting, without waiting to drain the ring.
Unit -5 - Configure a machine to assign an IP address to it and also put a suitable subnet mask.
Unit -6 - Connect two machines to a hub and ping one machine from the other. Now change the subnet masks of the machines and see the effects.
Unit -7 - Connect a client to a server via a hub and telnet to log in to the server.
Unit -8 - Connect a server to the switch and telnet to the server from the machines. Connect two machines to two different hubs and connect the hubs to a switch.
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