* Answer these questions

1. Define computer network.

---> A group of computer connected together to share data, information, software and even hardware in high speed is known as computer network.

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2. Write any three advantages of computer network.

---> The three advantages of computer network are as follow:
                * It is easy for users  to backup important data and information.
                * Computer network allows user to share data and software at the same time.
                * Computer network makes the communication between different users easier and faster.
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3. What are protocol?

---> Protocols are the setup rules which are responsible to send and receive data in computer networks.
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4. What is repeater?

---> A device of a network that regenerates the signal and converts a weak signal to a strong one is known as repeater.

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5. What is hub?

---> A small device with multiple ports which provides physical connection to different devices is known as hub.

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6. What is Network Interface Card (NIC) ?


---> A device which is mounted on the motherboard which is used to control the flow of data between two different computers is known as Network Interface Card.

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7. What is network operating system?

---> A group of programs which are used to manage the resources on the network is known as a network operating system.

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8. What is medium?

---> A communication channel which is used to connect different computers and devices in a network environment is known as medium.

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9. What is work station?

---> A computer where a user can work and access to share data and information is known as work station.



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10. What is server?

--->  The main computer of a network which provides services to other computer in a network environment is known as server.

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11. Differentiate between client-server network and peer-to-peer network.

--->  Client Server : The client server model of a network is one of the popular models, which consists of at least one server and one or more clients or workstations.
---> Peer to Peer Network : Peer to Peer Network is a group of computer which function equally as servers and workstations.



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12. Define LAN, MAN, and WAN.

---> A network that covers a very short area is known as LAN. eg- a network within a room, building, etc. ---> A network within a town/ a city to share data is known as MAN. eg - a network of branches of banks, companies, etc. ---> A network within a large scale of area is known as WAN. eg- a network within the branches of world bank, ADB, etc.