Computer Networks (AD-602) - Important Questions

Compare and contrast the OSI and TCP/IP reference models and evaluate their relevance in modern networking.

Classify computer networks and discuss the significance of service primitives in connection-oriented and connectionless services.

Calculate total number of links and total cost for Bus, Ring, Star and Mesh topologies for a given number of nodes, and analyze cost-effectiveness and redundancy.

Write short notes on any two of: Connection-Oriented and Connectionless services, Hybrid ARQ, ICMP, SNMP.

What is a computer network and what are its primary goals? Identify and explain the key components of a computer network including hardware and software elements.

Describe the seven layers of the ISO/OSI model, explaining the function of each layer with associated protocols and devices.

Explain the concept of data rate in the context of the physical layer. How is data rate related to the bandwidth of a communication channel? Explain.

Identify the layers in OSI reference model and illustrate their functions with suitable diagram.

Discuss about the design issues of computer network.

Explain the differences between connection-oriented and connectionless services.

Explain the basic operation/working of CSMA/CD and how collisions are detected and managed

Describe and compare Go-Back-N and Selective Repeat Sliding Window protocols.

What do you mean by Distributed Random Access Scheme? Compare and analyze the working principle of Pure and Slotted ALOHA protocols.

Explain the working of CSMA/CD and calculate the minimum frame size for given bandwidth and maximum propagation time

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

What are the key characteristics of the elementary protocol? Explain the operation of the 1-bit sliding window protocol in the Data Link Layer.

Explain the working principle of Sliding Window protocol with suitable diagram.

Explain the error control and flow control mechanisms employed at the Data Link Layer.

Explain IP packet fragmentation and reassembly, including why and when fragmentation occurs and its handling/performance implications

Explain the concept of hierarchical routing. What are its benefits and limitations compared to flat routing?

Apply Dijkstra's algorithm to find the shortest path from source node A to all other nodes in a given network.

Describe the basic idea behind Dijkstra's algorithm for shortest paths with a suitable example.

Why is the Network Layer necessary in computer networking? Discuss its role and importance and also explain the key services provided by the Network Layer.

Discuss the Least Cost routing algorithm with suitable example.

What is Routing? Differentiate between broadcast routing and Multicast routing?

Explain TCP connection management, including three-way handshake for connection establishment and graceful termination, with purpose of each step

Explain the UDP header format, its main fields and the purpose of each field.

Compare the working of TCP and UDP in terms of reliability, speed and use cases, Provide examples of applications that use each protocol.

Discuss the impact of TCP congestion control mechanisms such as Slow Start, Congestion Avoidance, and Fast Retransmit on network performance.

What is TCP Flow Control and why is it necessary in data transmission? Explain any challenges or limitations associated with TCP Flow Control.

Differentiate between congestion control and flow control.

Write a short note on (any two)

Explain the following application layer protocols:

Explain the differences between symmetric and asymmetric encryption and how modern ciphers improve network security compared to traditional ciphers.

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.

Define modern ciphers and explain their advantages over traditional ciphers.

Explain Simple Network Management Protocol (SNMP) and its functions.

What are Traditional ciphers? What are the different techniques used in traditional cipher? Explain.

Write a short notes on any two: