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IGNOU MCS-42 - Data Communication and Computer Networks

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Data Communication and Computer Networks

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IGNOU MCS-42 Code Details

  • University IGNOU (Indira Gandhi National Open University)
  • Title Data Communication and Computer Networks
  • Language(s) English
  • Code MCS-42
  • Subject Computer Application
  • Degree(s) MCA
  • Course Core Courses (CC)

IGNOU MCS-42 English Topics Covered

Block 1 - Introduction to Data Communication and Computer Network Concepts

  • Unit 1 - Introduction to Computer Network
  • Unit 2 - Data Transmission
  • Unit 3 - Data Encoding and Communication Technique
  • Unit 4 - Multiplexing and Switching

Block 2 - Media Access Control and Data Link Layer

  • Unit 1 - Data Link Layer Fundamentals
  • Unit 2 - Retransmission Strategies
  • Unit 3 - Contention-based Media Access Protocols
  • Unit 4 - Wireless LAN and Datalink Layer Switching

Block 3 - Network Layer

  • Unit 1 - Introduction to Layer Functionality and Design Issues
  • Unit 2 - Routing Algorithms
  • Unit 3 - Congestion Control in Public Switched Network
  • Unit 4 - Internetworking

Block 4 - Transport Layer and Application Layer Services

  • Unit 1 - Transport Services and Mechanism
  • Unit 2 - TCP/UDP
  • Unit 3 - Network Security-I
  • Unit 4 - Network Security-II
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IGNOU MCS-42 (July 2019 - January 2020) Assignment Questions

  1. (a) What is the need of modulating a signal? Will it be a right approach to send the information as the signal itself? (b) Explain techniques used in digital to analog modulation with the help of diagram
  2. (a) Discuss the different approaches to circuit switching? Why it is suitable for voice Transmission? What are its limitations? (b) How does multistage switching overcome these limitations?
  3. A bit string 011100111110001110 needs to be transmitted at the data link layer. What is the string actually transmitted after bit stuffing?
  4. (a) Define checksum and write the algorithm for computing the checksum?
  5. Define flow error control and piggybacking concepts. Show the operation of Stop & Wait ARQ with the help of an illustration. Also illustrate the outcome of Stop & Wait ARQ in the following scenarios. When ACK is lost When Frame is lost When ACK timeout occurs
  6. (a) How does MACAW work? Show diagrammatically. What are the added features in MACAW compared to MACA? (b) What are the advantages of frame fragmentation in wireless network? Explain.
  7. How does a bridge operate in different LAN environments? What are the problems encountered in building a bridge between the various 802 LANs? Discuss.
  8. Write Dijkstra and Bellman Fords shortest path routing algorithms and make a comparison between the two algorithms.
  9. (a) Discuss general principle of congestion control and the mechanisms used in congestion control in packet switched network. (b) Explain the implementation of token bucket traffic shaper with the help of a diagram?
  10. Explain with the help of an example and a diagram how the congestion controls algorithm (slow start algorithm) work at transport layer.
  11. (a) Define digital signature and explain its benefits. (b) What kind of a model is being used in India to provide public key infrastructure related services. (I.e. management of public keys). Elaborate.
  12. Discuss the implementation of Kerberos mechanism.
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