Question

A device operating at the physical layer is called a
1) Bridge
2) Router
3) Repeater
4) All of the above
5) None of these

Answer 1

The answer is 3. Repeater..

Answer 2

Answer:

A “repeater” is used to operate the device at the physical layer.

Explanation:

It is used to re transmit the digital or analog signal by the transmission loss. A digital repeater reconstructs the signal at the original capacity, at the time an analog repeater only amplify the signal. When there is a weak signal, it copy the signal bit by bit and it regenerated with their original signal.

Repeaters were introduced in wired data communication networks, the limitations of the signal is gets longer distance and now it is implemented in wireless networks.