------     ------   ------   ------    ------
               | SFI  |   | SFIa | | SFIb | | SFIc |  | SFI  |
               |SFT=41|   |SFT=42| |SFT=42| |SFT=42|  |SFT=43|
                ------     ------\  ------  /------    ------
                     \            \   |    /           /
                    ---------     ---------     ---------
      ----------   |   SFF1  |   |   SFF2  |   |   SFF3  |
 --> |          |..|192.0.2.1|...|192.0.2.2|...|192.0.2.3|-->
 --> |Classifier|   ---------     ---------     ---------
     |          |
      ----------