... СравнениеEthernet и IEEE 802.3 . ... IEEE 802.3 . ... The byte before the destination address in both an Ethernet and a IEEE 802.3 frame is a start-of-frame (SOF) delimiter . ... Immediately following the preamble in both Ethernet and IEEE 802.3 LANs are the destination and source address fields. ... In IEEE 802.3 frames, the 2-byte field following the source address is a length field, which indicates the number of bytes of data that follow this field and precede the frame check sequence (FCS) field...