The maximum Ethernet frame size of 1518 bytes is composed of which components?

The maximum Ethernet frame size of 1518 bytes is composed of which components?

• A. 14-byte header and 1500-byte payload only
• B. 14-byte header, 1500-byte payload, and 8-byte CRC
• C. 14-byte header, 1500-byte payload, and 2-byte CRC
• D. 14-byte header, 1500-byte payload, and 4-byte CRC

Answer: (D)

In Ethernet, a frame is made up of a header, a data payload, and a trailer. The 1518-byte maximum refers to the frame itself, not including the preamble or interframe gap. The header is 14 bytes, the payload can be up to 1500 bytes, and the trailer (Frame Check Sequence) is 4 bytes. So the largest standard frame is 14 + 1500 + 4 = 1518 bytes. The CRC is 4 bytes, not 2 or 8, and there is no extra 8-byte CRC in the standard frame.

In Ethernet, a frame is made up of a header, a data payload, and a trailer. The 1518-byte maximum refers to the frame itself, not including the preamble or interframe gap. The header is 14 bytes, the payload can be up to 1500 bytes, and the trailer (Frame Check Sequence) is 4 bytes. So the largest standard frame is 14 + 1500 + 4 = 1518 bytes. The CRC is 4 bytes, not 2 or 8, and there is no extra 8-byte CRC in the standard frame.