Computer Network

A computer network is a collection of computers and other devices interconnected to exchange information and resources. Once the computers are linked to a network, they can communicate with each other more quickly and easily.

Computer networks are applied in schools, offices, hospitals, banks, and homes.

Why Are We Having a Computer Network?

A computer network helps us:

• Share files and folders
• Share devices like printers
• Access the internet
• Send emails and messages
• Participate in online classes and meetings.
• Communication is made quicker and time-saving through networks.

Types of Computer Networks

LAN (Local Area Network)

A LAN is used to connect computers in a relatively small place, like a classroom, school, or office building.

MAN (Metropolitan Area Network)

A MAN is used to connect computers within a city.

WAN (Wide Area Network)

A WAN will link computers in a very wide geographical range, such as countries or continents.

Internet

The Internet provides the biggest network worldwide. It links millions of networks all over the world.

Elements of a Computer Network.

• Server – A very strong computer that runs the network.
• Client – Computers that are linked to the server.
• Router - Dispatches information within one network to another.
• Switch – Connects various devices within a network.
• Cables / Wi-Fi – Vehicle upon which data travels.

Wired and Wireless Networks

• Wired Network - Removes wireless cables that are used to connect devices.
• Wireless Network – Is a cable-free Wi-Fi signal.

The use of wireless networks is prevalent in residences and schools.

Network Safety Rules

• Use strong passwords
• Do not click on unknown links
• Install antivirus software
• Exit multiseminal computers.
• Do not publish personal information.

QUIZ FOR COMPUTER NETWORK

1. You are at a school where there are several computers connected to have a common file and share a printer as well. What type of network is this?

A) WAN
B) MAN
C) LAN
D) Internet

Answer: C) LAN

2. You have to write a message to a friend who is in a different country. What network would assist you in sending the message and receiving information globally?

A) WAN
B) LAN
C) MAN
D) Bluetooth

Answer: A) WAN

3. Suppose you want to make your home computer connected to the internet, but you do not use any cables. What kind of a network would you have?

A) Wired Network
B) Wireless Network
C) LAN
D) MAN

Answer: B) Wireless Network

4. Consider the case of a large office where computers located in various rooms are connected so that they can share resources. What kind of network is most probably being used?

A) LAN
B) MAN
C) WAN
D) Bluetooth Network

Answer: A) LAN

5. Which of these devices can be used to manage the direction of information flow among various computers in a network?

A) Router
B) Keyboard
C) Monitor
D) Printer

Answer: A) Router

6. Which kind of network would you require in case you wish to communicate between two computers in two different countries?

A) LAN
B) MAN
C) WAN
D) Wi-Fi

Answer: C) WAN

7. How do we define the purpose of a server in a computer network?

A) It transmits information to the router.
B) It manages the network and stores valuable information.
C) It links equipment to the internet.
D) It acts as a monitor

Answer: B) It manages the network and stores valuable information.

8. What kind of network are you using at home when browsing the web using Wi-Fi?

A) LAN
B) MAN
C) WAN
D) Wireless Network

Answer: D) Wireless Network

9. You have recently used a public computer in one of the libraries. What is the ideal thing to do before going?

A) Leave the computer on
B) Log out of your account and shut down properly.
C) Only walk away, do not shut down.
D) Open fresh tabs so that the next one can use them.

Answer: B) Log out of your account and shut down properly.

10. What is your reaction upon receiving a suspicious email message from an unknown sender?

A) Click on the link and observe what happens.
B) Do not reply to the email and delete it.
C) Forward it to your friends.
D) Open the connection unhesitatingly.

Answer: B) Do not reply to the email and delete it.