IEEE 802.3 definition networking
standard defining the hardware layer and transport layer
of (a varient of) Ethernet
. The maximum segment
length is 500m and the maximum total length is 2.5km. The maximum number of hosts is 1024.
The maximum packet
size is 1518 bytes. If the upper layer protocol
submits a PDU
less than 64 bytes, 802.3 will pad the LLC Info field to achieve the minimum 64 bytes.
Although it is not technically correct, the terms "packet
" and frame are used interchangeably. The ISO
802.3 Standards refer to MAC
consisting of the Destination Address, Source Address, Length, LLC Info., and FCS
fields. The Preamble
and SFD are (usually) considered a header to the MAC
Frame. This header plus the MAC Frame constitute a "Packet".