JNTU
JNTU B.Tech III COMPUTER NETWORKS Previous Question Paper (May - 2018 - R13)
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
What is Internet. Differentiate it from intranet.
Answer
The Internet is a global system of interconnected computer networks that use the standard Internet Protocol Suite (TCP/IP) to link devices worldwide. An Intranet is a private network contained within an enterprise, accessible only to authorized users, whereas the Internet is a public network accessible to anyone.
Discuss the design issues of data link layer.
Answer
The Data Link Layer manages the transfer of data between adjacent nodes. Key design issues include:
- Framing: Breaking the bit stream into manageable units called frames.
- Error Control: Detecting and correcting transmission errors using techniques like CRC or checksums.
- Flow Control: Preventing a fast sender from overwhelming a slow receiver.
- Medium Access Control: Determining which device has the right to transmit in shared channel environments.
When do we use hubs?
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What are main functionalities of routers? What is purpose of using multiprotocol routers?
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What is optimality principle?
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Discuss congestion control algorithms on brief.
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What is CIDR addressing
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Discuss the principles of internetworking.
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What is silly window syndrome?
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Draw TCP and UDP headers.
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PART - B
Compare and contrast OSI and TCP/IP reference models. Critique on each model.
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Explain sliding window protocol.
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Describe go back N protocol.
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Define collision. Explain collision free protocols. Mention advantage of each protocol.
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Explain the following:
Bridges
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Gateways
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Repeaters.
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The major problem with distance vector routing algorithm is ‘count to infinity’. How exchange complete path form router to destination instead of delay, helps in solving count to infinity problem.
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Explain the design issues of network layer.
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Discuss the hierarchical routing with examples.
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Given a network address of 192.168.100.0 and a subnet mask of 255.255.255.192.
How many subnets are created?
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How many hosts are there per subnet?
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Discuss ICMP Messages.
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Explain Tunneling in Internet layer.
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Illustrate the TCP connections, TCP releases with state transition diagram.
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Describe DNS with diagrams and real-time examples.
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