DATA COMMUNICATION (EC-603 (A)) - Important Questions

What is data communication? List/describe the five main components of a data communication system with block diagram.

Explain the concept of network topology and describe types such as bus, star, ring and mesh, including network classification.

Explain the simplex, half-duplex and full-duplex modes of data transmission with examples.

Calculate and compare transmission time for serial vs parallel transfer of a given amount of data.

Write a short note on selected topics including topology, HDLC, SONET and internetworking devices.

Differentiate between serial and parallel data transmission and give examples of their use.

Given a binary sequence 10110011011001, illustrate how it would be encoded using unipolar NRZ, polar NRZ and bipolar NRZ encoding schemes.

What is data communications? Explain its characteristics.

Explain different types of Networks.

What are Standards? Name any four standard organizations for Data communications.

Explain the OSI reference model with a neat diagram of the seven layers, describing the main function of each layer and how they interact to facilitate network communication.

Define transmission medium and explain the differences between guided media and unguided media.

Describe the various types of transmission impairments that can affect communication signals and what measures can be taken to mitigate these impairments.

What is message switching, how does it differ from packet switching, and what are its advantages and disadvantages?

What is switching and what are the different switching techniques (circuit switching, packet switching, and message switching)?

What are the benefits of packet switching and what is the difference between virtual circuit and datagram approaches?

Illustrate how the Longitudinal Redundancy Check (LRC) code is generated and how it is used to detect errors in transmission.

Describe the methods of framing in data communication and how they support error detection and data integrity.

Explain the HDLC protocol, its main features and modes of operation.

Compute the CRC using the CRC-8 polynomial $x^8+x^2+x+1$ for given data, showing the division process.

Describe the Sliding Window protocol and explain how it improves efficiency compared to Stop-and-Wait protocol

Explain CRC with an example and distinguish single-bit error from burst error.

Write short notes on i) Stop-and-Wait protocol, ii) Framing, iii) HDLC, iv) ARQ

What is an Error? Explain the types of errors.

Explain error-correction mechanisms in detail with suitable examples.

Explain data link layer protocols, their functions and types.

Write a short note on checksum.

Compare and contrast Token Bus and Token Ring LAN architectures.

Discuss the architecture and operation of the DQDB protocol (IEEE 802.6) and how it supports data transmission in a MAN.

What is Asynchronous Transfer Mode (ATM)? Explain its cell-based architecture and switching mechanisms.

Discuss FDDI, its main features, fault tolerance and high-speed communication.

Compare and contrast DQDB and SMDS in design, functionality and use cases in MANs.

Discuss the role of Frame Relay in modern networks, how it achieves efficient data transmission, and its limitations compared to newer technologies.

Explain the concept of Token Ring (IEEE 802.5) LAN.

Explain LAN and its architecture.

Write a short note on X.25 and Frame Relay.

Explain the concept of Token Bus (IEEE 802.4) LAN.

Explain Metropolitan Area Network (MAN) and its architecture.

Write a short note on ATM and SONET.

Explain the structure and layers of the TCP/IP reference model / protocol suite with neat diagram.

Explain the roles and functions of repeaters, bridges, and gateways in a computer network.

Define link state routing and compare it with distance vector routing in terms of routing table updates and route calculation.

Explain the concept of distance vector routing and how it determines the best path to a destination with a suitable example.

Write short notes on link state routing, sliding window, Ethernet, and line encoding.

Write short notes on gateways, framing, FDDI, and transmission mode.

Write a short note on routing algorithms in general.

Write a short note on any two :