(MTU) The largest number of bytes of "payload"
data a
frame can carry, not counting the frame's header
and trailer.
A frame is a single unit of transportation on the
data link layer. It consists of header data plus data which was passed
down from the
network layer (e.g. an
IP datagram) plus
sometimes trailer data.
An Ethernet (V2) frame has a MTU of 1500 bytes but the size of
the frame can be up to 1526 bytes (22 byte header, 4 byte CRC
trailer).
See also
fragmentation.