JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech II DATA COMMUNICATION Previous Question Paper (December - 2017 - R15)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
PART A
Write about activities of Electronics Industries Association.
Answer
The Electronics Industries Association (EIA) is primarily responsible for developing and maintaining standards for electronic components and data communication interfaces. Its key activities include setting technical specifications for physical layer connections, such as the RS-232 standard, to ensure interoperability between different manufacturers' equipment.
Write in brief about mesh topology.
Answer
In a mesh topology, every device is connected to every other device in the network via a dedicated point-to-point link. This provides high reliability and fault tolerance, as the failure of one link does not disrupt the entire network, though it requires a high number of physical connections and cabling.
Write the disadvantages of optical fiber communication.
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Write the advantages of TDM and FDM.
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Define cross talk.
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What is meant by the term loop resistance?
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What is meant by the term false handoff?
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Define forward error correction.
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Classify voice band modems.
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Write the function of digital service unit.
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PART B
Draw the block diagram of a two station data communication circuit and explain.
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Write the characteristics of network interface cards.
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Describe MAN.
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Describe Cisco three layer model.
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Discuss the characteristics of file servers.
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Write short notes on M-ary encoding.
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Describe time division multiplexing and its frame format.
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Write short notes on broad band LANs.
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Describe Frequency division multiplexing.
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Write in brief about channel services.
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Explain the operation of echo suppressor using a relevant diagram.
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Explain the operation of a cord less telephone system using relevant transmitter and receiver diagrams.
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Explain the operation of a paging system using relevant diagrams.
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Write short notes on transmission line parameters.
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Describe Personal Communications System.
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Determine the BCS for the following data and CRC generating Polynomials D(x) and P(x) respectively. D(x) = x7+x6+x3+x2+x+1, P(x) = x5+x4+x+1
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Explain character synchronization for asynchronous serial data.
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Write short notes on channel service unit.
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Write short notes on cable modems.
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Write short notes on asynchronous voice band modems.
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Briefly discuss the 56 K Modems.
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