Computer Worksheet Class 8 : Introduction to Computers Networking Operating System
Computer Worksheet Class 8 English Medium. This page’s topic is Introduction to Computer Networking Operating Systems. We have given here several types of questions, i.e., MCQ, Very Short, Long, Application-Based Questions, Full Forms, Fill in the Blanks, True and False, and many more.
Q1) Multiple Choice Questions :- (5 Marks)
1) It refers to the inter-connection of various devices to share their resources.
a) Joining b) Adding c) Networking d) Connecting
Answer – c) Networking
2) It is a group of devices connected to one another and allows exchange of data with
each other.
a) Connect b) Network c) Join d) None of these
Answer – b) Network
3) A ……………………. can be of any size.
a) Computer b) Network c) Bungalow d) All of these
Answer – b) Network
4) A device which joins two computers or networks.
a) Bridge b) Connectors c) Joiner d) Fixer
Answer – b) Connectors
5) It defines the rules for communication between network devices.
a) Network Protocol b) Rules book c) Brochures d) None of these
Answer – a) Network Protocol
6) The electronic device to exchange data wirelessly over a computer network.
a) Bluetooth b) Radio c) WiFi d) Protocol
Answer – c) WiFi
Q2) Write down the full forms of the following abbreviations :- (12 Marks)
a) CUI – Character User Interface.
b) NIC – Network Interface Card.
c) IBM – International Business Machine.
d) PAN – Personal Area Network.
e) LAN – Local Area Network.
f) CAN – Campus Area Network.
g) MAN – Metropolitan Area Network.
h) WAN – Wide Area Network.
i) TCP/IP – Transmission Control Protocol/ Internet Protocol.
j) HTTP – Hyper Text Transfer Protocol.
k) Wi-Fi – Wireless Fidelity.
l) DOS – Disk Operating System.
Q3) Answer the following questions in one sentence each :- (7 marks)
1) What is computer network?
Answer: – It is a form of network in which collection of different computers and peripheral devices (which are known as networking hardware) are been joined with each others with the help of cables, wires etc.
2) What is a file server?
Answer :- In the computer network, a file server is a system which is connected to other computers or de vices in a network and shares or distributes files to different users within a network.
3) What is Network hardware?
Answer: – Network hardware is a concept where the requirement of physical hardware for the creation or smoothly functioning of the computer network.
4) What is a Connector?
Answer: – Connectors are the devices which are used in order to connect two computers or network together.
5) What is a Protocol?
Answer: – A protocol is a set of rules and regulations which helps the users/devices to communicate with each other smoothly in a network.
6) What is Hotspot?
Answer: – A device which provides/enables the facility of WiFi and gets easily connected to the internet through the wireless network access (without using any cables or wires) point, is termed as Hotspot.
7) What is the role of the Computer Network Architect?
Answer: – The Computer Network Architect is responsible for designing or creating the different forms of computer networks such as LAN, WAN etc.
Q4) Answer the following questions in brief :- (16 marks)
1) What is the hardware required for a computer network?
Answer – For setting up or smooth working of the computer network there is requirement of various physical peripheral devices which are known as hardware. The essential hardware required for computer network are as follows :-
a) Computer: – It is most important to have a computer as a hardware in the networking process. As if in networking we are going to connect the computers with different cables, connectors etc. if the computers are been connected to each other, then other users can make use the network more efficiently or smoothly. It is not binding that in the computer network the computers should not be of same type, they can be of other types too. Different types of computers are been made used in networking such as IBM- Compatible and Macintosh.
b) Cables: – These are the mediums through which the computers or other devices in the network are been connected. As per the size of the networks, cable size or type is determined. The speed of the transferring information and dropping it to its final destination totally based upon the type of the cable that is been used. Miles of cables is used in the networking.
c) Connectors: – Connectors are the devices which are used in order to connect two computers or network together.
d) Network Interface Card (NIC) :- It acts a joiner or connector between the computer and the cable. Mostly the NIC cards are installed inside the computer, edge portion of the NIC can be seen at the back of the computer. NIC consists a port where the cable of the network is plugged in.
2) Explain the different types of networks?
Answer – There are various types of networks which are as followed :-
a) Personal Area Network (PAN) :- This form of network is used when wish to communicate with various devices such as personal computers or mobile phones which are located at a very short distance (in metres). PAN network is sued for connecting the devices with the internet wirelessly.
b) Local area Network (LAN) :- It is the mostly used type of network which is usually used for connecting the devices which are located to one another at a small distance somewhat in a building. In this type of network maximum 100 computers are been added. Ex of LAN network is computers which are connected in Office, Schools etc.
c) Campus Area Network (CAN) :- It is a network which is made between the connection of two or more LAN networks with the specified limited area/distance. In comparison to LAN (Local Area Network) this type is bigger and smaller than WAN (Wide Area Network).
d) Metropolitan Area Network (MAN) :- This network is also the collection of many LANs. In this type of network the computer which bare located in the same geographical region or area gets connected to each other say in the same city or town.
e) Wide Area Network (WAN) :- It is a network type where the LAN and MAN are connected. In this network type, the devices can be connected within the country or the world such as the ATM facility, Internet facility etc.
3) Explain the four types of Network Topologies?
Answer – Following are the four types of Network topologies which are :
a) Star Topology :- In this topology form, all the nodes are connected to a central point named as Switch. Switch is responsible for transferring the data to its final destination and controls the communication with in the network.
b) Ring Topology :- In this network topology, the computers are connected to each other in the closed form which means each is connected to other two devices on one or the other side. The computers in this form of topology are connected in a circular shape.
c) Bus Topology :- In this topology, all the nodes are been connected to a central cable known as bus. In this topology, bus is treated as the single continuous cable. The transmission from every node travels the length of the bus in both directions and can be received by all other nodes in the network. There is presence of terminators in the bus which either ends or stops the signals removing it from the bus.
d) Mesh Topology :- Here, in this form of topology several nodes are connected to one another which allows every single node to have connection with the other nodes in the network.
4) What is an Operating system? Explain its functions?
Answer – An operating system is an system software which acts as the bridge between the user and the computer system. Operating system performs the work of starting and shutting down the computer. It also looks after the controlling and sharing the computer system and its resources. It acts as medium of communication between the computer system/hardware and the user.
Following are the functions of Operating System:-
a) Program Execution: – The operating system intakes system commands or programs, interprets them and then executes them.
b) Device Management: – Whatever the devices whether they are input or output devices connected to the system are been controlled by the operating system.
c) File Management: – It also helps in arranging/managing the files and folders in the computer system and also provides space on the secondary storage devices if it’s necessary. It also keeps the records of every files present on the disk.
d) Memory Management: – The operational speed of the computer system mostly depends on the memory. The main memory of the computer system is been managed by the operating system and smoothens the functioning of the computer system.
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