Question 6 - Teachoo Sample Paper - Computer Science Class 12 - Solutions to CBSE Sample Paper - Computer Science Class 12

Raj wants to access the internet from his home using a cable modem. He connects his computer to a local cable TV line. Which type of network is he using in this case? 

1. PAN 

2. LAN 

3. MAN 

4. WAN

Answer:

Answer by student

d. WAN

Detailed answer by teachoo

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The question is about the types of networks that are classified based on their geographical area and number of computers. There are four main types of networks: PAN, LAN, MAN, and WAN.

Let’s look at each of the options and see why they are correct or incorrect.

• a. PAN : This stands for Personal Area Network, which is the smallest network of computers. It connects personal devices such as smartphones, laptops, tablets, etc. using wireless technologies like Bluetooth or infrared. It has a range of up to 10 meters or 33 feet. This is incorrect , as Raj is not using a personal device to connect to the internet, but a cable modem.
• b. LAN : This stands for Local Area Network, which connects a group of computers in a small area, such as a building or an office. It uses switches, hubs, cables, or wireless access points to link the computers. It has a high data transfer rate and low cost. This is incorrect , as Raj is not connecting to a network within a small area, but to a network that spans a large area.
• c. MAN : This stands for Metropolitan Area Network, which connects a network of computers within a city or a town. It uses technologies like Ethernet, ATM, or FDDI to link the computers. It has a moderate data transfer rate and cost. This is incorrect , as Raj is not connecting to a network within a city or a town, but to a network that spans beyond that.
• d. WAN : This stands for Wide Area Network, which connects a network of computers across a country or the world. It uses technologies like routers, modems, satellites, or cables to link the computers. It has a low data transfer rate and high cost. The internet is the largest example of a WAN. This is the correct option, as Raj is using a cable modem to connect his computer to the internet, which is a WAN.

To get the correct answer, we need to understand that:

• A network is a collection of computers and devices that are connected to communicate and share data and resources.
• A network can be classified based on its geographical area and number of computers into four types: PAN, LAN, MAN, and WAN.
• A PAN is the smallest network that connects personal devices using wireless technologies.
• A LAN is a small network that connects computers within a building or an office using switches, hubs, cables, or wireless access points.
• A MAN is a medium-sized network that connects computers within a city or a town using technologies like Ethernet, ATM, or FDDI.
• A WAN is the largest network that connects computers across a country or the world using technologies like routers, modems, satellites, or cables.

So, the correct answer is d. WAN

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