9th Class Computer Chapter 3 Networks Short Questions Answer
9th Class Computer Chapter 3 Networks Short Questions Answer
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What is computer network?
A computer network consists of computers and devices connected together to share information and resources. The resources may include printers, hard disks, scanners or programs etc.
How are computers connected in computer network?
The computers in the network are connected together through communication media such as physical cable or a wireless connection. The communication medium is also known as communication channel.
List any five uses of computer network?
Five uses of computer network include sending/receiving emails, playing online games, watching videos, reading newspaper and studying online.
Give an example of sharing a file using a computer network.
Computer network can be used to share files. For example, the education board can share the date sheet file with all students. The students can access it over the internet.
What is video conferencing?
Video conferencing is a popular method of communication. A video conference uses computers. Video cameras, microphones and networking technologies to conduct face to face meetings over the Internet.
How can a computer network help to increase storage capacity?
Computer network can be used to increase the storage capacity. The users do not need to store everything on personal computer. They can store and access the files remotely on the computer with higher storage capacity.
Write two examples of remote storage service.
The popular services for remote storage are Drop Box and Google Drive.
Why server is more powerful than clients?
Server provides services to client computers. It performs more activities than clients such as processing data, controlling access and sharing software etc. That is why the server is more powerful than clients.
What are different types of dedicated servers?
Different types of dedicated servers include file server, print server, database server and web server. A dedicated server is used to perform a specific task. For example, file server is used to store and manager files. Print server is used to manage printers and print jobs.
What is client?
The client is a computer in the network that is connected with a server to access different resources. It sends request to the server for resources. The client is typically less powerful than server.
How do the client and server communicate with each other?
The client and server communicate with each other over network. The client sends request to the server for resources. The server provides the requested resource to client.
What is a client application?
A client application is the software that is used to send a request from client to server. It provides an interface to transfer the request to the server. Web browser is an example client application.
What is point-to-point connection?
A point-to-point connection refers to the direct link between a sender and a receiver. Both devices are connected with one connection line. The connection between a TV and the remote control is an example of point-to-point connection.
What is multipoint connection?
A multipoint connection refers to the link between one sender and multiple receivers. A single link can be shared by more devices. Wi-Fi based network is an example of multipoint connection. This connection is shared among multiple devices.
What is network topology?
A network can be arranged in different ways. The physical layout or arrangement of connected devices in a network is called network topology. It is the shape of a network.
List different types of network topologies?
Difference network topologies include bus topology, ring topology, star topology, tree topology and mesh topology.
What is bus topology?
Bus topology is the simplest type of network. It supports a small number of computers. In bus topology, all computers or network nodes are connected to a common communication medium. This medium is known as bus or backbone.
Why terminators are used in bus topology?
When the signal reaches the end of the wire, it bounces back and travel up to the wire. Terminator is added at the ends of the central wire to prevent bouncing of signals.
What happens if a bus topology has too many computers?
Bus topology typically supports a small number of computers. The network of bus topology becomes slower if it has too many computers in it.
Write any three advantage of bus topology?
It is simple and easy to use. It requires small length of cable to connect computers. It is less expensive.
How does star topology work?
Al computers in star topology are connected with a central device called hub or switch. The sending computer sends the data to central device. The central device sends data to the receiving computer. Each computer in star network communicates with a central device, If Central device fails, the whole network becomes useless.
Give any three features of star topology?
Star topology is suitable both for small and large networks. It is easy to maintain and modify. It is more flexible than other topologies.
Why star topology is more reliable than bus or ring topology?
Star topology is more reliable than bus or ring topology. It allows the user to remove or add a device without affecting the network. It is easier to troubleshoot than other topologies. If one computer fails, it does not affect the other computers in the network.
What is ring topology?
In ring topology, each computer is connected to the next computer with the last one connected to the first. A ring can be unidirectional or bidirectional. In a unidirectional ring, data can be sent in one direction. In a bidirectional ring, data can travel in any direction.
What is data communication?
Data communication is the exchange of messages between sending and receiving devices through a communication medium. The messages are the information that may be in the form of text, numbers, images, audio and video.
List different components of data communication?
Different components of data communication system are sender, receiver, message, protocol and transmission medium.
What is sender in data communication?
Sender is a device that sends the message. It initiates communication process. It is also called source or transmitter. A Computer is normally used as sender in data communication.
What is receiver in data communication?
Receiver is a device that receives the message: it is also called sink. The receiver must be capable of accepting a message. The receiver can be Computer, printer or another computer related device.
What is message in data communication?
The message is the data, information or instruction to be communicated. It may consist of text, number, picture, audio, video or a combination of these.
What do you mean by protocol?
A protocol is a set of rules that governs data communication. It is a formal agreement between communication devices to send and receive information. The devices cannot communicate without protocol.
How is the sender and receiver connected in data communication?
Medium is the path that connects sender and receiver. It is used to transmit data. It is also called communication channel.
What are different types of transmission medium?
The transmission medium can be wired or wireless. The Wired transmission media are twisted pair cable, coaxial cable and fiber optic cable. The wireless transmission media include radio waves, microwaves and satellites etc.
What is a router?
Router is a networking device that connects multiple networks. It can transmit data from one network to another network in less time. It manages the best route between any two communication networks. It can be used on a network of any size.
How does a router forward a packet?
A router analyses the destination IP address of the incoming data packet. It determines the best route to forward the packet. It then sends the packet to that route. A router is usually placed at the meeting point of two or more networks.
How does routing process work in networking?
Routing is a process of transferring data from the device on one network to the device on another network. Every packet has two addresses. The source address identifies the device that sends data. The destination address identifies the device that receives data.
