Why networks enable communication and resource sharing in Computer Networks - Quick Recap

Recall & Review

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What is a computer network?

A computer network is a group of connected devices that can share information and resources with each other.

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How do networks enable communication?

Networks allow devices to send and receive messages, like emails or chats, so people can talk or share data easily.

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What does resource sharing mean in networks?

Resource sharing means using things like printers, files, or internet connections together instead of each device having its own.

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Why is resource sharing useful?

It saves money and space because many users can use the same resources without buying or setting up duplicates.

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Give a real-life example of network communication.

Sending a message on a phone app or video calling a friend uses a network to connect and share information instantly.

What is the main purpose of a computer network?

A To store data only on one device

B To make devices work slower

C To connect devices for communication and sharing

D To separate devices completely

Networks connect devices so they can communicate and share resources.

Which of these is an example of resource sharing in a network?

A Multiple users print from one shared printer

B Each computer has its own printer

C No printers are used

D Printers are disconnected

Sharing one printer among many users saves money and space.

How does a network help people communicate?

A By blocking messages

B By allowing devices to send messages to each other

C By turning off devices

D By deleting files automatically

Networks let devices send and receive messages, enabling communication.

What is NOT a benefit of resource sharing?

A Buying more equipment for each user

B Using resources efficiently

C Saving money

D Saving space

Resource sharing reduces the need to buy extra equipment for each user.

Which device is commonly shared in a network?

A Television

B Refrigerator

C Microwave

D Printer

Printers are often shared among multiple devices in a network.

Explain how networks enable communication between devices.

Think about how your phone talks to your friend's phone.

Describe why resource sharing is important in a network.

Consider why offices use one printer for many workers.

Practice

1. Why do computer networks enable communication between devices?

easy

A. Because they make devices physically larger

B. Because they increase the speed of individual devices

C. Because they replace the need for software applications

D. Because they connect devices allowing data exchange

Solution

1. Step 1: Understand the role of networks

   Networks link devices so they can send and receive information.

2. Step 2: Identify how communication happens

   By connecting devices, networks allow data to move between them easily.

3. Final Answer:

   Because they connect devices allowing data exchange -> Option D

4. Quick Check:

   Networks connect devices = communication enabled [OK]

Hint: Networks connect devices to share data easily [OK]

Common Mistakes:

• Thinking networks speed up devices individually
• Confusing networks with software functions
• Believing networks change device size

2. Which of the following is the correct way to describe a network's function?

easy

A. Networks store all data locally on each device

B. Networks allow devices to share resources like printers

C. Networks prevent devices from communicating

D. Networks make devices work without electricity

Solution

1. Step 1: Review network functions

   Networks enable devices to share resources such as printers and files.

2. Step 2: Eliminate incorrect options

   Networks do not store data locally on each device, prevent communication, or supply power.

3. Final Answer:

   Networks allow devices to share resources like printers -> Option B

4. Quick Check:

   Resource sharing = networks enable it [OK]

Hint: Networks share resources like printers and files [OK]

Common Mistakes:

• Thinking networks store data only locally
• Believing networks block communication
• Assuming networks provide power to devices

3. Consider this scenario: A home network connects a laptop, a smartphone, and a printer. Which of the following is true?

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A. The smartphone can print documents using the printer over the network

B. The printer can send emails to the laptop directly

C. The laptop cannot access the internet through the network

D. Devices on the network cannot share files

Solution

1. Step 1: Understand device roles in a home network

   Devices connected in a network can share resources like printers and internet.

2. Step 2: Analyze each option

   The smartphone can use the printer via the network; printers do not send emails; laptops usually access internet through networks; file sharing is possible.

3. Final Answer:

   The smartphone can print documents using the printer over the network -> Option A

4. Quick Check:

   Network resource sharing = smartphone prints [OK]

Hint: Devices on a network share printers and internet [OK]

Common Mistakes:

• Assuming printers send emails
• Thinking laptops can't access internet via network
• Believing file sharing is impossible on networks

4. A small office network is not allowing employees to share files. What is the most likely cause?

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A. The network cables are unplugged

B. The printer is turned off

C. File sharing is disabled on the devices

D. The internet connection is slow

Solution

1. Step 1: Identify the problem context

   Employees cannot share files, which depends on device settings and network connection.

2. Step 2: Evaluate each option's impact

   Unplugged cables stop all network communication; file sharing disabled stops file access; printer off does not affect file sharing; slow internet affects speed but not local sharing.

3. Final Answer:

   File sharing is disabled on the devices -> Option C

4. Quick Check:

   File sharing disabled = no file sharing [OK]

Hint: Check if file sharing is enabled on devices first [OK]

Common Mistakes:

• Blaming printer status for file sharing issues
• Assuming slow internet stops local file sharing
• Ignoring device settings for sharing

5. In a company, employees need to access a shared database and print documents from different floors. How does the network enable this?

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A. By connecting all computers and printers to a central network allowing resource sharing

B. By installing the same software on every device without connecting them

C. By using separate internet connections for each floor

D. By physically moving files using USB drives only

Solution

1. Step 1: Understand network resource sharing in a company

   Networks connect devices so they can share resources like databases and printers across locations.

2. Step 2: Compare options for enabling access

   Connecting devices to a central network allows shared access; installing software alone doesn't connect devices; separate internet connections don't share resources; USB drives are manual and inefficient.

3. Final Answer:

   By connecting all computers and printers to a central network allowing resource sharing -> Option A

4. Quick Check:

   Central network connection = shared access [OK]

Hint: Central network connects devices for shared access [OK]

Common Mistakes:

• Thinking software alone shares resources
• Assuming separate internet connections share files
• Relying only on USB drives for sharing