Course Title : Fundamentals of Computer Networks
Assignment Number : BCA(IV)/Assignment/14-15
Maximum Marks : 100
Weightage : 25%
Last Date of Submission : 15th October, 2014 (For July 2014 Session)
15th April, 2015 (For January 2015 Session
DOWNLOAD:BCS-41 solved assignment
1 (a) Calculate Cyclic Redundancy Check (CRC), where Message bits M=1010101110 andGenerator bits G=10001.(4 Marks)
(b) Write an algorithm to compute the shortest path using Dijkstra’s algorithm.(6 Marks)
(c) Describe the configuration of BUS, STAR, and RING network topologies, with their
one advantage and one disadvantage. (6 Marks)
(d) Describe the different techniques used to multiplex signals? (4 Marks)
2 (a) What is Pulse Code Modulation (PCM)? Assume the maximum signal bandwidth of speech data is 4,000Hz. What is the sampling rate for converting speech intodigital data using Pulse Code Modulation (PCM)? If each sample is encoded by 8 bits, what is the data rate of the encoded signal (6 Marks)
(b) Write RSA algorithm and explain it using an example. (8 Marks)
(c) Show the signals that will be generated when the sequence 01010001 is encoded using NRZI and Differential Manchester encoding schemes. (4 Marks)
(d) Why are the wires twisted in a twisted-pair copper wire? (2 Marks)
3 (a) What are the major differences between wired LANs and wireless LANs? What are the two main problems with wireless LANs. Briefly, describe the physical layer standards of IEEE 802.11.
(b) Make a comparative analysis between IPV4 and IPV6. (4 Marks)
(c) What is congestion? What are the main reasons for occurring congestion in the network? Explain the techniques to solve the problem of congestion. (8 Marks)
4(a) Explain the features of HDLC and describe in detail the Frame Format. (8 Marks)
(b) Make a comparison of channel utilization versus load for various random access
protocols. (6 Marks)
(c) Discuss why repeaters are needed in a communication channel. What is a key difference between an analog repeater and a digital repeater? (6 Marks)
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