If you are on this Page You Want to Download IGNOU MCS 218 Important Questions / Exam Notes 2023 Data Communication and Computer Networks In this section, You will find all the Exam important Questions of all courses which are divided by the Section “SEMESTER WISE”.
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| S.NO | Some Questions |
| 1 | (a) What is meant by CRC ? Write the following bitstring in polynomial representation : “1100010” (b) What are Wireless LANs ? Discuss the disadvantages of using radio transmitters. |
| 2 | (a) What is Transmission Media ? Compare optical fiber with copper wire. 5 (b) What is meant by burst error ? How can burst errors be corrected ? |
| 3 | (a) Explain the three types of internetwork addresses with a suitable example for each. (b) Explain the concept of Diffie-Hellman key generation. Generate public and private key pairs using RSA algorithm using 7 and 11 as two prime numbers. |
| 4 | (a) Differentiate between PSK and FSK modulation techniques. Explain the term ‘‘Quantization’’. (b) Draw IPv4 header structure and explain the significance of Fragment offset. |
| 5 | (a) What is encoding ? Explain digital-to-digital encoding with an example. (b) Explain the characteristics of Wide Area Network (WAN). Differentiate between client-server and peer-to-peer architecture |
| 6 | (a) Briefly discuss the terms CSMA and CSMA/CD. Explain Ethernet frame format IEEE 802.3. (b) Explain the utility of Spanning Tree and Source Routing Bridges in computer networks. |
| 7 | (a) Define handshaking protocol. What are the\ types of services provided by the transport layer ? (b) What is Nagle’s Algorithm ? Explain TCP connection establishment in normal operation |
| 8 | What is meant by Modulation? Explain techniques used in digital to analog modulation with the help of a diagram. |
| 9 | Sketch the Manchester and RƵ encoding of the following bit stream: 1011 00 11 01 01 11 |
| 10 | (a) Discuss the key features of random access protocols (multiple access protocols). (b) Draw and explain the vulnerable period for pure Aloha protocol and obtain its throughput expression. |
| 11 | What are the advantages of frame fragmentation in wireless network? Explain. |
| 12 | Explain the implementation of token bucket traffic shaper with the help of a diagram |
| 13 | Discuss the QAM (Quadrature Amplitude Modulation) technique. Draw 8-QAM constellation diagram. |
| 14 | (a) What is the utility of a digital certificate? Explain how digital signatures are created? (b) Explain key generation algorithm for RSA with an example. (c) Explain the concept of RPC in detail. |
| 15 | Define the term Internet Backbone. What are the key differences between tier-1 ISP and tier-2 ISP? Explain. |
| 16 | What are the three methods to access the internet? Provide a brief description of how connections establishment, advantages and disadvantages of each method. |
| 17 | Describe the three types of signal distortion in transmission media. What kinds of delays occur during data transmission? |
| 18 | Discuss the key distinguishing features of QAM (Quadrature Amplitude Modulation) technique as compared to other modulation techniques. Draw 8-QAM constellation diagram. |
| 19 | How does the slotted Aloha protocol work? Derive its throughput expression and plot its throughput Vs load graph. |
| 20 | Describe the two fundamental problems related to a wireless network. How does the MACAW protocol address the problems? Explain |
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