BSC CSIT Semester 4 – Computer Networks 2076 TU Final Exam Questions & Answers

Question 1

Explain each layer of TCP/IP model in detail. Compare it with OSI model.

Marks: 10

Chapter: Unit 1: Introduction to Computer Network (6Hrs.)

TCP/IP Model and Comparison with OSI Model TCP/IP Model Layers 1. Application Layer - Provides network services directly to user applications. - Protocols: HTTP, FTP, DNS, SMTP. - Combines O

Question 2

Define transmission media. What are different types of transmission media? Explain different types of unguided media in detail.

Marks: 10

Chapter: Unit 2: Physical Layer and Network Media (4Hrs.)

Transmission Media Definition: Transmission media are the physical paths through which data is transmitted from one device to another in a network. --- Types of Transmission Media Transmission medi

Question 3

Define flow control. Expalain Go-Back-N ARQ with suitable example. How is it different from Stop- and-Wait ARQ?

Marks: 10

Chapter: Unit 3: Data Link Layer (8Hrs.)

Flow Control and Go-Back-N ARQ Flow Control Flow control is a technique used in data communication to prevent the sender from overwhelming the receiver with too much data at a time. It ensures that t

Question 4

Define network topology. Explain ring topology along with its merits and demerits.

Marks: 5

Chapter: Unit 1: Introduction to Computer Network (6Hrs.)

Network Topology Definition: Network topology is the physical or logical arrangement of nodes (computers, devices) and the connections between them in a network. It determines how data flows between

Question 5

Explain LAN with example. How is it different from PAN?

Marks: 5

Chapter: Unit 1: Introduction to Computer Network (6Hrs.)

Local Area Network (LAN) Definition: A Local Area Network (LAN) is a network that connects computers and devices within a small geographic area, such as a home, office, or building, allowing resourc

Question 6

Define routing table. Differentiate static routing table with dynamic routing table.

Marks: 5

Chapter: Unit 4: Network Layer (10Hrs.)

Routing Table Definition: A routing table is a data table stored in a router or a networked computer that lists the routes to particular network destinations. It is used to determine the best path f

Question 7

What is switching? Compare and contrast a circuit-switched network and packet-switched network.

Marks: 5

Chapter: Unit 4: Network Layer (10Hrs.)

What is Switching? Definition: Switching is the process of transferring data from a source to a destination through a network. It determines the path that data takes to reach its destination. Types

Question 8

Why do we need wireless LAN? Explain the architecture of IEEE 802.11 in detail.

Marks: 5

Chapter: Unit 6: Application Layer (7Hrs.)

Why Do We Need Wireless LAN? Definition: A Wireless LAN (WLAN) allows devices to connect to a local area network without physical cables, using radio waves. Reasons for Using WLAN: 1. Mobility: User

Question 9

What is NAT? How does it work? What are its benefits?

Marks: 5

Chapter: Unit 4: Network Layer (10Hrs.)

Network Address Translation (NAT) Definition: Network Address Translation (NAT) is a technique used in routers to map private (internal) IP addresses to a public (external) IP address for communicat

Question 10

In a block of addresses, we know the IP Address of one host is 192.34.12.56/28. What are the first address (network address) and the last address(Limited broadcast address) in this block?

Marks: 5

Chapter: Unit 4: Network Layer (10Hrs.)

Given: - IP Address: 192.34.12.56/28 - Subnet Mask (CIDR /28): 255.255.255.240 - This gives 16 addresses per subnet (2^4 = 16). --- Step 1: Determine Network Address 1. Find the block size:

Question 11

Why do we need a DNS system when we can directly use an IP address? What is domain name space?

Marks: 5

Chapter: Unit 6: Application Layer (7Hrs.)

Why DNS is Needed - Humans find it difficult to remember numeric IP addresses like 172.217.5.110. - DNS (Domain Name System) translates human-friendly domain names (like www.google.com) into IP addr

Question 12

Write short notes on: (any two)\ a. Connection-oriented service\ b. Bridge\ c. Hamming distance

Marks: 5

Chapter: Unit 3: Data Link Layer (8Hrs.)

Short Notes a. Connection-Oriented Service - In this service, a dedicated path is established between sender and receiver before data transfer. - Ensures reliable delivery with sequencing, error c

BSC CSIT Semester 4 – Computer Networks 2076 TU Final Exam Questions & Answers

Tribhuvan University

Institute of Science and Technology

SECTION A

SECTION B

Exam Years