Which device regenerates signals to extend network range at the Physical Layer?

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Accepted Answer

Repeater - A Repeater is a network device that works at the Physical Layer of the OSI model. Its main job is to take weak or old signals and regenerate them so they can travel further without errors.

As data moves through cables over long distances, the signal can become weak or noisy. A repeater helps by cleaning and boosting the signal before sending it on. This allows the network to cover longer distances without losing data quality.

Key points about Repeaters:

Operates at the Physical Layer (Layer 1)
Regenerates and strengthens weak signals
Used to extend the range of a network
Does not filter, route, or understand data — just boosts the signal


Interview Tip: If asked about Physical Layer devices or how networks cover large areas, you can mention repeaters as devices that help by boosting signals.

Conclusion: The repeater is a simple but important device at the Physical Layer that ensures data can travel longer distances without loss by regenerating signals.

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