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Q: In IT networking, which of the following device is used in physical layer?
  • A. Repeater
  • B. Router
  • C. Transport Gateway
  • D. Bridge
Correct Answer: Option A - In information technology networks repeater are used in the physical layer. A repeater is an electronic machine that receives and transmits signal for further use.
A. In information technology networks repeater are used in the physical layer. A repeater is an electronic machine that receives and transmits signal for further use.

Explanations:

In information technology networks repeater are used in the physical layer. A repeater is an electronic machine that receives and transmits signal for further use.