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Computing (FOLDOC) dictionary
IEEE 802.3
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The IEEE 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/IEC 8802-3
ANSI/IEEE 802.3 Standards refer to MAC sub-layer
frames 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".