DCA6206 COMPUTER NETWORKS & PROTOCOLS

Description

SESSION	SEPTEMBER_ 2025
PROGRAM	MASTER OF COMPUTER APPLICATIONS (MCA)
SEMESTER	II
COURSE CODE & NAME	DCA6206 COMPUTER NETWORKS & PROTOCOLS

 

 

SET-I

 

 

Q1. Explain the concept of a computer network and describe the different types of computer networks with suitable examples. 3+6         

Ans 1.

Concept of a Computer Network

A computer network is a structured system in which multiple computers and digital devices are interconnected for the purpose of sharing data, resources, and services. The fundamental idea behind networking is to enable communication and collaboration between devices regardless of their physical location. Through a network, users can share files, printers, software applications, storage systems, and even processing power. A computer network functions by using hardware components such as routers, switches, network interface cards, cables, and wireless technologies, along with protocols

 

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Q2. Design a new communication architecture for an organization by integrating the principles of the OSI model. Explain how each layer in your proposed model contributes to efficient network performance          10            

Ans 2.

Designing a Communication Architecture Using OSI Principles

Designing an effective communication architecture requires integrating the layered principles of the OSI (Open Systems Interconnection) model. A well-structured architecture ensures reliability, standardization, performance, and scalability. For an organization, adopting a layered communication model allows independent management of hardware, protocols, and applications while

 

Q3. Compare and evaluate the performance of various guided transmission media in terms of cost, bandwidth, security, and reliability. Recommend the most appropriate medium for high-speed data communication with justification. 5+ 5      

Ans 3.

Performance Evaluation of Guided Transmission Media (Cost, Bandwidth, Security, Reliability)

Guided transmission media refer to physical channels through which signals travel in a controlled and defined pathway. Common forms include twisted-pair cables, coaxial cables, and fiber optic cables. Each medium provides different capabilities in terms of cost, bandwidth, security, and reliability. Evaluating these characteristics allows organizations to choose the most suitable option

 

SET-II

 

Q4. Critically evaluate the differences between LAN, MAN, and WAN in terms of performance, cost, scalability, and application suitability. Support your evaluation with real-world examples. Additionally, assess how the choice of network topology can influence the efficiency and reliability of these networks.     5+ 5    

Ans 4.

Critical Evaluation of LAN, MAN, and WAN

Computer networks differ significantly in their scale and purpose. LAN, MAN, and WAN are the three primary categories, each designed to cater to specific geographical areas and organizational needs. Their evaluation requires a detailed understanding of how performance, cost, scalability, and

 

Q5. Explain the TCP/IP model. How does it differ from the OSI model? 5+ 5  

Ans 5.

Explanation of the TCP/IP Model

The TCP/IP model is a practical communication framework used for data exchange across interconnected networks. It forms the backbone of modern internet communication and provides a standard method for transmitting data across different hardware architectures and operating systems. The model consists of four layers, each responsible for specific networking functions.

Layers of the TCP/IP

 

Q6. What is an IP address? Differentiate between IPv4 and IPv6 addressing schemes 5+ 5   

Ans 6.

Meaning of IP Address

An IP address is a unique numerical identifier assigned to each device connected to a computer network that uses the Internet Protocol. It serves two essential functions: device identification and location addressing. Just like a postal address, an IP address enables data packets to reach the correct destination from any location in the world. Without IP addresses, devices could not participate in network