JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III DATA COMMUNICATION AND COMPUTER NETWORKS Previous Question Paper (January/February - 2023 - R18)
Question paper consists of Part A and Part B. Part A is compulsory (25 marks). In Part B, answer any one question from each unit (10 marks each).
Part A
What are the important components of any data communications systems?
Answer
The five fundamental components of a data communications system are the Message (the data to be communicated), Sender (the device that sends the data), Receiver (the device that receives the data), Transmission Medium (the physical path by which the message travels), and Protocol (a set of rules that govern data communication).
What are the key elements of any network protocol?
Answer
The three key elements of a network protocol are:
- Syntax: Refers to the structure or format of the data, including the order in which data is presented.
- Semantics: Refers to the meaning of each section of bits, including how a particular pattern is interpreted and what action is to be taken based on that interpretation.
- Timing: Refers to two characteristics: when data should be sent and how fast it can be sent.
List all the framing techniques.
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What is TDMA?
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Write the network id, host id and class of the ip address 125.125.125.125.
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What is fragmentation? Write its significance.
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What is a socket in transport layer?
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List all QoS parameters of transport layer.
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What is a hierarchical namespace in DNS?
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Write a brief note on WWW.
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Part B
What is the need of a network standard? Explain various functions of each layer in OSI reference model in detail.
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Brief explain about frame relay networks.
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Compare datagram networks and circuit switched networks.
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Calculate the Hamming code for the bits 10101010.
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Explain simple stop and wait protocol.
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Write about the control frames of HLDC protocol.
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Explain the frame format of IEEE 802.3 standard.
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What do you understand about classfull IP addresses? Explain.
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Explain the significance of options field of IP packet.
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Explain unicast routing protocol in detail.
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Consider a block of IP addresses with IP address 205.16.35.39/28 granted to a small organization and i) find the range of IP addresses ii) draw the LAN configuration.
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Write about the addressing mechanisms adopted by the transport layer.
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Explain how a typical client and server communication takes place in a typical network.
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Write a comparative notes on TCP and UDP protocols.
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What is congestion? Explain any two methods of handling it.
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Explain the importance of a user agent.
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Explain how a file transfer is done using FTP?
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Explain DNS in internet in detail.
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