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1 COMPUTER NETWORKING MCQS

Which of the following is a Physical Layer standard?

  • Ethernet (IEEE 802.3)
  • IP
  • TCP
  • FTP
Correct Answer: A. Ethernet (IEEE 802.3)

Detailed Explanation

Ethernet (IEEE 802.3) is a standard that works at the Physical Layer and also partly at the Data Link Layer of the OSI model. It defines how data is physically transmitted over a cable or medium.

This standard includes details about cables, connectors, signal types, and how devices connect and communicate at the hardware level.



Key points about Ethernet (IEEE 802.3):



  • Defines physical media types (like twisted pair, fiber optic)

  • Controls how bits are placed on the wire

  • Works at the lowest levels of network communication

  • Used in most LAN (Local Area Network) setups



Because it manages how devices physically connect and send signals, Ethernet is a standard related to the Physical Layer.

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