(CBSE) Class 8th Computer Network question answer 2024-25

CBSE Class 8th Computer Network question answer 2024-25: True, False, fill in the blanks, tick the correct

Class 8th Computer Network question answer: Written by Sweta Nanda Chapter-1 Computer Network, Computer Science, Coding and I.T. The analysis with answers to the questions of all the lessons has been done by our team on our website "News Vela". So that you all students should not face any difficulty in writing and remembering answers to any type of questions.

In the first lesson of class 8th, all the questions related to computer network have been explained with answers and explanations so that the students do not face any kind of problem in studying for the session 2024-25.

Class 8th Computer Network Important key highlight 

Post Name	Class 8th Computer Network question answer 2024-25
Year	2024
Chapter Name	Computer Network (CH-1)
Class	8th (CBSE)
Types of students	Class 8th English Medium
Types of questions & answer
Tick the correct	5 questions answer
Fill in the blanks	5 questions answer
Computer Network related advantages	4 questions answer
Computer Network related disadvantage	4 questions answer
Differences Between
LAN and WAN	MAN and WAN
Bus topology and ring topology	Star topology and mesh topology
Peer-to-Peer and client/server	Pan and can
Explain the working of the following
NIC	MODEM
HUB	BRIDGE
REPEATER	SWITCH AND ROUTER AND GATEWAY

CLASS-8^TH: COMPUTER NETWORK (CH.NO-1)

Q. you must have heard the term social network. is a social network and a computer network the same? Why/why not?

Explanation: - No, social network and computer network are different:-

Social Network:- A social network is like a large group of friends who connect with each other online, like on apps or websites. We exchange photos, messages and updates with each other.

Computer Network:- Computer network is different. In this network, computers are connected to each other at one place, so that they can share files or devices like printers.

In this way we can say that computer network and social network are different.

Q. What is a Computer Network?

Explanation:- A Computer network is a system of interconnected computers and peripheral devices that are linked in order to share resources such as printers, exchange files, and allow electronic communication.

Communication through email, messaging and video conferencing, promoting collaboration and quick decision making.

Centralized Data Management: Centralized servers allow easy data storage and backup while ensuring data integrity and security.

Remote Access: Users can access network resources and data remotely, enabling flexible work arrangements and increasing productivity.

Scalability: Networks can easily expand to accommodate growing business needs, supporting more users and devices without significant infrastructure changes.

Cost Efficiency: By sharing resources and localizing operations, networking reduces hardware and operating costs over time.

Advanced Security: Networks can implement strong security measures like firewalls and encryption to protect against unauthorized access and data breaches.

Overall, computer networking optimizes communication, resource utilization, and collaboration, bringing efficiency and innovation to a variety of fields.

Q. Tick the correct answers.

1.       This network uses TCP/IP Network Protocol for communication between computers.

a)       LAN

b)      WAN

c)       MAN

d)      None of these

Answer : (b) WAN

2.       Which topology has exactly two neighbors for communication purposes?

a)       Ring

b)      Mesh

c)       Bus

d)      None of these

Answer : a) Ring

3.       In which topology are all the nodes connected to a linear cable?

a)       Star

b)      Bus

c)       Ring

d)      None of these

Answer : b) Bus

4.       Which of the following is a network operating system?

a)       Peer-to-peer

b)      Bus

c)       Star

d)      None of these

Answer : a) Peer-to-peer

5.       A client/server network controls the server through --------------------------------.

a)       Resources

b)      Data security

c)       Both

d)      None of these

Answer : a) Resources 

B. Fill in the blanks.

Router ,  Novell Netware ,  Bus,   Peer-to-peer,   Hub ,   Windows 2000 ,   Wan

1.       A ---------------------------------- Features a WAN that is built around a city or a section of a city.

2.       In a ------------------------------- network operating system, there is no file server or a centralized management source.

3.       --------------------- and --------------------- are examples of client/server network operating systems.

4.       In ----------------- topology is easy to connect a computer or peripheral to a linear bus.

5.       In a star topology, the -------------------, ---------------------- or concentrator manages and controls all the functions of the network.

Answer : -

1. WAN 

2. Peer-to-peer 

3. Windows 2000 and Novell Netware 

4. Bus 

5. Hub , Router  

C. Write any two advantages of each of the following:

1.       Ring topology

2.       Peer-to-peer

3.       Bus topology

4.       Star topology

Answer :  

1. Ring Topology:

Efficiency: In ring topology, data travels in only one direction, making it easier to send data. There is very little difficulty in receiving and sending data.

Simple Installation: Ring topology is simple to install and expand. Adding or removing any device does not affect the network.

 2. Peer-to-Peer:

Concurrency: In a peer-to-peer network, all devices are identical, which reduces the need for a central server.

Sustainability: The network increases in size whenever new devices are added, which increases stability.

3. Bus Topology:

Simplicity and Cost-Effectiveness: Bus topology requires less cabling, making it easier to install. It is more suitable for small networks.

Flexibility: Adding or removing devices in this topology is simple, and does not impact the network.

4. Star Topology:

Central Management: In this, all the devices are connected to a central hub, which helps in managing the network.

Fault Isolation: If a device fails, its impact is generally limited to just between that device and the hub, not affecting other devices. This ensures problem resolution and network continuity.

D. Write one disadvantage of each of the following:

     1.       Star topology
2.       Mesh topology
3.       Peer-to-peer
4.       Client/server

 Answer : One disadvantage of the following topology 

1. Star Topology: Easy troubleshooting but if the central hub fails, the entire network can go down.

2. Mesh Topology: Provides redundancy with multiple paths for data, but requires a complex and expensive infrastructure.

3. Peer-to-Peer: Decentralized, but challenging to maintain scalability and security.

4. Client/Server: Efficient resource management, but dependency on servers can cause network-scale problems if they fail.

E. Write the differences between:

     1.       LAN and WAN
2.       MAN and WAN
3.       Bus topology and ring topology
4.       Star topology and mesh topology
5.       Peer-to-peer and client/server
6.       PAN and CAN

Answer : 1.The Differences between LAN vs WAN:

LAN	WAN
LAN (Local Area Network) is limited to a small geographical area like home, office or school. It is usually owned and managed by a single person or organization.	WAN (Wide Area Network) spans a large geographic area, connecting LANs across cities, countries, or continents. The Internet is the largest WAN, connecting millions of devices around the world.

Answer 2. The Differences between Man vs Van:

MAN	WAN
MAN (Metropolitan Area Network) covers a larger area than a LAN but a smaller area than a WAN, usually within a city or metropolitan area. It connects multiple LANs in the same area.	WAN (Wide Area Network) connects LANs over long distances spanning cities, countries or continents.

Answer 3. The Differences between Bus vs Ring Topology:

Bus topology	Ring topology
Bus topology: Devices are connected in a linear manner with a single cable called a bus. Data travels in both directions along the bus, and if the cable breaks, the entire network can fail.	Ring topology: Devices are connected in a circular manner, forming a closed loop. Each device acts as a repeater, reproducing the signal and transmitting it further. If one device fails, it can disrupt the entire network.

Answer 4. The Differences between Star vs Mesh Topology:

Star topology	Mesh topology
Star topology: All devices are connected to a central hub or switch. If one device fails, it has no effect on the rest of the network. Adding or removing devices is easy.	Mesh topology: Every device is connected to every other device, creating multiple paths for data to move. It is highly redundant and fault-tolerant, but requires a lot of cabling and configuration.

Answer 5. The Differences between Peer-to-Peer vs Client/Server:

Peer-to-peer	Client/Server
Peer-to-peer: Each device can act as both a client and server, sharing resources directly with other devices without a central server. Common in file sharing networks such as Bit Torrent.	Client/Server: Devices are divided into clients, which request services or resources, and servers, which provide them. Servers are dedicated to serving clients and managing resources such as web servers or email servers.

Answer 6. The Differences between Pan vs Can:

PAN	CAN
PAN (Personal Area Network): Covers a small area, usually within range of a person, such as a room or personal space. Examples include Bluetooth devices or personal health monitoring systems.	CAN (Campus Area Network): Covers a large area such as a university campus or corporate office complex. It connects multiple LANs at a single physical location.

F. Explain the working of the following:

     1.       NIC
2.       MODEM
3.       Hub
4.       Bridge
5.       Repeater
6.       Switch and router
7.       Gateway 

Answer :

1. NIC (Network Interface Card): Think of it as a translator between your computer and the network. It connects your device to a network by converting data from your computer into a format that can be sent over the network, and vice versa.

2. MODEM (Modulator-Demodulator): This device helps your computer communicate with the internet. It takes the digital signals from your computer, converts them into analog signals for transmission over telephone or cable lines, and then converts incoming analog signals back into digital for your computer to understand.

3. Hub: Imagine a hub as a central meeting point where all devices in a network connect. When one device sends data, the hub sends it to all other devices connected to it. It's like a party line where everyone hears everything.

4. Bridge: Picture a bridge as a smart traffic cop for networks. It connects two separate network segments and decides whether to pass data between them based on their addresses. It helps to filter and manage traffic, improving network performance.

5. Repeater: Think of a repeater as an amplifier for network signals. It receives weak signals, boosts them, and then sends them along, extending the range of the network. It's like having a relay runner who strengthens the signal before passing it on to the next runner.

6. Switch and router: Both of these devices help direct traffic in a network, but they do it differently. A switch operates at the data link layer and forwards data to specific devices within a network based on their MAC addresses. It's like a mail sorter that directs letters to the correct mailbox in a neighborhood. A router, on the other hand, operates at the network layer and forwards data between different networks based on IP addresses. It's like a GPS system that guides data packets to their destinations across different roads.

7. Gateway: This is like the entrance and exit point of a network, linking different types of networks together. It translates data between incompatible networks, such as converting data from a local network to the internet or vice versa. It's like a translator at an international conference, making sure everyone understands each other. 

G. Answer the following questions.

1. What is a network? Explain.

Answer : A network is a collection of computers, servers, mainframes, network devices, or other devices connected together to share resources, communicate, and exchange data. Networks can be as small as two devices connected in a home setting or as large as global networks connecting millions of devices across the world, such as the internet. They enable the sharing of information, resources like printers and files, and provide communication channels between users.

2. Name various network topologies.

  Answer :- Some common network topologies include:

·       Bus Topology

·       Star Topology

·       Ring Topology

·       Mesh Topology

·       Hybrid Topology

3. Name the different networks.

   Answer :- There are various types of networks, including:

·       Local Area Network (LAN)

·       Wide Area Network (WAN)

·       Metropolitan Area Network (MAN)

·       Personal Area Network (PAN)

·       Virtual Private Network (VPN)

·       Wireless LAN (WLAN)

·       Storage Area Network (SAN)

·       Campus Area Network (CAN)

4. What are the advantages and disadvantages of a ring topology?

   Answer :- Advantages:

·       Data travels in one direction, reducing collisions and packet loss.

·       Simple and easy to install and maintain.

·       Suitable for small networks.

   Disadvantages:

·       If one node or connection fails, the entire network can be affected.

·       Expansion or adding new nodes can disrupt the network.

·       Performance can degrade as more devices are added.

 5. What is a mesh topology? Why is it not used commonly?

In a mesh topology, every node is connected to every other node in the network. While it offers robust redundancy and fault tolerance, ensuring that data can still be transmitted even if one or more connections fail, it's not commonly used due to the following reasons:

High cost: It requires a significant amount of cabling and infrastructure to establish connections between every node.

Complexity: Managing and configuring a mesh network can be complex and challenging.

Scalability: As the number of nodes increases, the complexity and cost of the network also increase exponentially.

6. Define a client/server network operating system.

A client/server network operating system is a type of operating system that allows multiple client devices (such as computers, smartphones, or tablets) to access resources and services provided by centralized servers. In this architecture, the server handles tasks such as storing data, managing user authentication, and providing applications or services, while client devices request and utilize these resources. Examples include Windows Server, Linux-based server operating systems, and mac OS Server.