Which of the following networking devices is used to regenerate and transmit the weakened signal ahead? (A) Hu

Question 26 of 50

Q. Which of the following networking devices is used to regenerate and transmit the weakened signal ahead? (A) Hub (B) Ethernet Card (C) Repeater (D) Modem

Yanam CbseCBSE Class XII Board 2025MCQ· 1mImportance★★★★★

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Concept understanding — Network Devices

Network Definition: A First Look

Think about your phone. When you call a friend, send a WhatsApp message, or watch a YouTube video, your device isn't doing all the work alone. It is connected — to a tower, to a cable, to a server somewhere — and through that connection, it talks to other devices. That web of connections is a network.

At its simplest, a network is just two or more devices linked together so they can share something. That "something" could be data (a photo), a resource (a printer), or a service (internet access). The key idea is connection and sharing.

The Precise Meaning

In formal terms, as the NCERT textbook defines it, a computer network is an interconnection of two or more computers (or devices) that enables them to exchange information and share resources.

Let's break that down:

Interconnection — The devices are physically or wirelessly linked. This could be through cables (Ethernet), radio waves (Wi-Fi), or even satellite signals.
Two or more — A single computer is not a network. The moment you connect it to another device, you have a network.
Exchange information — This is the primary purpose. You send an email, download a file, or stream a movie. All of that is information moving across a network.
Share resources — This is the practical payoff. Instead of every computer needing its own printer, scanner, or internet connection, a network lets many devices use the same resource.

Note

A network does not require the internet. Two laptops connected directly with a cable form a network, even if neither has internet access. The internet is simply the largest, most famous network — a "network of networks."

Why Does This Matter?

Without networks, every computer would be an island. You would have to carry a USB drive everywhere to move a file. You could not check your bank balance from home. A classroom of 30 students would need 30 separate printers.

Networks solve three fundamental problems:

Distance — You can access data stored on the other side of the world in seconds.
Efficiency — Resources like printers, storage space, and software licenses can be used by many people, reducing cost.
Collaboration — Multiple people can work on the same document, play the same game, or attend the same video call.

A Simple Example …

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A Repeater is the networking device specifically designed to regenerate and retransmit weakened signals over long distances.

The question asks which device takes a signal that has grown weak or distorted after travelling through a cable and gives it a fresh, strong boost to continue its journey. This is a classic problem in networking: signals lose strength (attenuate) as they travel, and beyond a certain distance the data becomes unreadable.

Let’s look at each option.

A Hub is a simple multiport device that connects multiple computers in a network. It works at the physical layer and merely broadcasts every incoming signal to all other ports. It does not regenerate or clean up the signal — it just repeats the electrical signal as-is, including any noise or weakening. So a hub is not the right answer.

An Ethernet Card (also called a Network Interface Card or NIC) is the hardware inside a computer that allows it to connect to a network. It handles the conversion of data into signals for the cable, but it does not sit in the middle of a long cable run to boost a weakened signal. Its job is at the endpoint, not along the path.

A Modem (modulator-demodulator) converts digital signals from a computer into analogue signals for transmission over telephone lines (or cable lines), and vice versa. Its purpose is to bridge different types of media, not to regenerate a weakened signal on the same type of cable. A modem does not amplify or clean up a fading signal in the way the question describes.

Note

The term "Modem" in the question is a distractor — it sounds like it might "modulate" a signal, but that is a different process from regeneration. Modems convert between digital and analogue; repeaters work entirely within the same signal type. …

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Q.Which of the following networking devices is used to regenerate and transmit the weakened signal ahead? (A) Hub (B) Ethernet Card (C) Repeater (D) Modem

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