What is the Ethernet MTU size?

What is the Ethernet MTU size?

• A. 1500 bytes
• B. 1518 bytes
• C. 1400 bytes
• D. 1450 bytes

Answer: (A)

MTU is the maximum payload size that a single Ethernet frame can carry, typically the IP packet inside the frame. For standard Ethernet, that payload limit is 1500 bytes. The whole Ethernet frame can be up to 1518 bytes long when you include the 14-byte header and the 4-byte FCS, but those extras are not part of the MTU. The other values aren’t the default Ethernet MTU—they’re either larger than the payload limit or refer to the total frame size. So, the Ethernet MTU is 1500 bytes.

MTU is the maximum payload size that a single Ethernet frame can carry, typically the IP packet inside the frame. For standard Ethernet, that payload limit is 1500 bytes. The whole Ethernet frame can be up to 1518 bytes long when you include the 14-byte header and the 4-byte FCS, but those extras are not part of the MTU. The other values aren’t the default Ethernet MTU—they’re either larger than the payload limit or refer to the total frame size. So, the Ethernet MTU is 1500 bytes.