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Previous Year Question Paper

CY-403 - Computer Networks

June 2024•CSCY•SEMESTER-4
June 2024
Max Marks:
Duration:
Q.1
a)Unit 1

Describe each of the seven layers of the ISO/OSI model. For each layer explain its function and provide examples of protocols and devices associated with it.

b)Unit 1

What is Shannon's Theorem and what does it state about the maximum data rate of a communication channel? Establish a relationship between channel capacity, bandwidth and signal-to-noise ratio (SNR) according to Shannon's Theorem.

Q.2
a)Unit 1

What do you understand by transmission media. Give the difference between Guided and Unguided media.

b)Unit 2

Why is error control necessary in data communication? Describe the methods used for error detection and correction in the Data Link Layer.

Q.3
a)Unit 2

Calculate the CRC checksum for a data word represented by the polynomial D(x) = x^5 + x^4 + x^2 + 1 and a CRC polynomial C(x) = x^3 + x + 1.

b)Unit 2

How does ALOHA handle contention among multiple devices trying to access the shared channel? Give the advantages and limitations of the pure ALOHA protocol.

Q.4
a)Unit 3

Describe the key features and characteristics of the IEEE 802.3 Ethernet standard.

b)Unit 3

What is a network switch and what role does it play in computer networking? How does a switch build and maintain its MAC address table?

Q.5
a)Unit 4

What are the primary design issues in the Network Layer and also discuss the main functions performed by the Network Layer?

b)Unit 4

Explain the concept of Shortest Path Routing with suitable example. Also discuss the advantages and limitations of Shortest Path Routing.

Q.6
a)Unit 4

Explain the role of each layer in the TCP/IP protocol stack with suitable layered architecture.

b)Unit 4

What is ICMP? Describe the role of ICMP messages in network communication. What types of information do ICMP messages convey? Explain.

Q.7
a)Unit 5

What is the Domain Name System (DNS) and what role does it play in computer networking? Explain how DNS translates domain names to IP addresses and vice versa.

b)Unit 5

What is load shedding and how does it relate to congestion control? Discuss some techniques used for load shedding in the Transport Layer.

Q.8
Unit 1

Write a short note on any two : a) Circuit, Packet and Message Switching b) HDLC c) Router and Gateways d) Connection establishment and release