Which of the following device used at the Physical Layer?

Question

Accepted Answer

Hub - The Physical Layer of the OSI model is responsible for sending raw bits over a physical medium like cables or fiber. It deals with the actual hardware and transmission of signals.

A Hub is a device that operates at the Physical Layer. It takes the incoming signal from one port and copies it to all other ports. It does not look at any data or make decisions about where to send it.

Main features of a hub:

Works with electrical signals, not data
Does not filter or process data
Broadcasts the signal to all connected devices
Simple and low-cost hardware


Because of these functions, hubs are considered Physical Layer devices. Other devices like routers and switches work at higher layers of the OSI model.

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