Which layer of the OSI model converts digital bits into electrical, optical, or radio signals?

Options

  • A. Physical Layer
  • B. Network Layer
  • C. Session Layer
  • D. More than one of the above
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

A. Physical Layer

Detailed Explanation

Explanation: The Physical Layer (Layer 1) transmits raw bits over a physical medium by defining electrical, optical, mechanical, and radio signal characteristics.