JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD MCA 2018 COMPUTER NETWORKS Previous Question Paper (January - 2018 - R13)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 20 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 8 marks and may have a, b, c as sub questions.
PART - A
Why protocols and standards needed.
Answer
Protocols are essential to ensure that devices from different manufacturers can communicate by establishing a common set of rules for data formatting, timing, and error control. Standards provide a uniform framework that promotes interoperability, competition, and innovation by preventing vendor lock-in and ensuring that hardware and software components function correctly within a global network ecosystem.
Define about random access of channel.
Answer
Random access, or contention-based, channel protocols allow multiple stations to compete for access to a shared communication medium without a pre-assigned schedule. In these methods, no station has priority; instead, stations transmit data whenever they have it, using specific rules to detect or avoid collisions, such as CSMA (Carrier Sense Multiple Access) or CSMA/CD.
Write the functionality of network layer.
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What is meant by Tunneling?
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Explain about TELNET.
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PART - B
What is meant by CRC codes?
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Compare and contrast the Go-Back-N ARQ protocol and Selective Repeat ARQ protocol.
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Define Piggybacking and its usefulness.
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Explain the TCP/IP Protocol suite.
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Describe in detail about pure ALOHA.
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What are the uses of a router and gateway?
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What is the importance of spanning tree bridges.
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Explain about CSMA/CA.
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Explain Distance vector routing with an example.
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Give a detailed description on store and forward packet switching.
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What is meant by congestion in network? Explain any algorithm for congestion avoidance.
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What is meant by hierarchical routing explain?
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Compare and Contrast the fields in the main header of IPv4 and IPv6.
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Explain the addressing mechanism in transport layer.
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Explain the extension headers of IPv6.
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Explain about connection establishment and release in Transport layer.
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Write short on Application layer protocols
HTTP
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FTP
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What are the services provided by the User agent of Electronic mail system explain.
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Explain the header fields of TCP.
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