esp-idf/docs/_static/diagrams/ethernet/data_frame_format.diag

#Ethernet Data Frame Format

rackdiag ethernet_data_frame {
    node_width = 500;
    default_fontsize = 15;
    ascending;
    8U;
    description = "Ethernet Data Frame Format";
    1: Preamble (7 Bytes) [color = lightgrey];
    2: Start-of-Frame Delimiter (1 Byte) [color = lightgrey];
    3: Destination Address (6 Bytes) [color = lightblue];
    4: Source Address (6 Bytes) [color = lightblue];
    5: Type / Length (2 Bytes) [color = lightyellow];
    6: Payload (0 ~ 1500 Bytes) [2U];
    6: Pad (if necessary) [2U];
    8: Frame Check Sequence (4 Bytes) [color = lightgrey];
}