JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD MCA 2023 COMPUTER NETWORKS Previous Question Paper (March - 2023 - R20)
Question paper consists of Part A, Part B.
Part A is compulsory, which carries 25 marks. In Part A, Answer all questions.
In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
Compare and contrast LAN and WAN.
Answer
A Local Area Network (LAN) is restricted to a small geographic area like a building or campus, typically uses private ownership, and offers high data rates with low error rates. In contrast, a Wide Area Network (WAN) spans large geographic areas such as countries or continents, often utilizes leased telecommunication lines or satellite links, and generally exhibits lower data rates and higher error rates due to the complexity of the infrastructure.
Compute the CRC for a 8-bit sequence 10100001 and a divisor of 110101.
Answer
To compute the CRC for the 8-bit sequence 10100001 with a divisor 110101 (degree 5):
- Append 5 zeros to the data: 1010000100000.
- Perform modulo-2 division of 1010000100000 by 110101.
- The remainder after division is 01110.
- The transmitted frame is 1010000101110.
What are the merits and demerits of Store-and-Forward switching?
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List various fields in TCP header and define each field.
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Give a brief note on DNS Resource Records.
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Part B
What are the six service primitives that provide a connection-oriented service? Explain them briefly.
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List and explain various guided media for transmitting actual data in a computer network.
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Make a comparison of TCP/IP reference model and OSI reference model.
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Compare and contrast flow control and error control.
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Devise the algorithm for a stop-and wait protocol and explain in detail.
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Explain the sliding window protocol using Go-Back-N algorithm in brief.
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How does slotted ALOHA protocol differs from Pure ALOHA protocol? Explain slotted ALOHA in brief.
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Briefly describe Broad cast and Multi cast routing.
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What are the services provided by the Network layer to the Transport layer?
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Explain Hierarchical Routing algorithm with an illustrative example.
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State the advantages and disadvantages of Hierarchical Routing algorithm.
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Discuss various primitives for a simple transport service.
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Explain the steps in making a remote procedure call.
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With the help of an example socket program explain how to implement a communication between an internet file server and its clients.
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Give an overview of how email systems are organized and what email system can do with a neat architectural diagram.
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Write a brief note on streaming audio.
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Explain the Multipurpose Internet Mail Extensions (MIME) message header.
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