Difference between Giant Frame and Jumbo Frame Can someone enlighten me the difference between Giant Frame and Jumbo Frame? From what I hear, **Giant frame** is a frame with the size greater than 1518 Bytes excluding Preamble, Frame Delimiter and Inter-Frame Gap. On the other hand, **Jumbo frame** is a frame with a payload greater than the standard maximum transmission unit (MTU) of 1500 bytes. So, are they referring the payload as in the Ethernet frame? If so, does it mean that Giant Frame and Jumbo Frame are the same?

Generally, a _giant frame_ is a frame that is too large for the receiving interface. As a malformed frame it is dropped.

A _jumbo frame_ is a frame that is larger than the standard allows (1518 bytes for Ethernet w/o tags, or 1500 bytes L3 payload (= L3 PDU = L2 SDU) plus L2 overhead). It may still be acceptable, depending on the interface configuration.

For an interface with standard configuration, any _jumbo frame_ is a _giant frame_.

Preamble, frame delimiter and IPG belong to the physical layer (L1) and are never counted against the frame size (L2), as you've pointed out.