+-------------------------------+
                                |           Application         |
   +---------------+            +-------------------------------+
   |  Application  |            |             MPTCP             |
   +---------------+            + - - - - - - - + - - - - - - - +
   |      TCP      |            | Subflow (TCP) | Subflow (TCP) |
   +---------------+            +-------------------------------+
   |      IP       |            |       IP      |      IP       |
   +---------------+            +-------------------------------+