+---------------------------------+
|                                 |
|         DetNet App-Flow         |
|       (Original IP) Packet      |
|                                 |
+---------------------------------+ <--\
|       DetNet Control Word       |    |
+---------------------------------+    +--> PREOF-capable
|       Service-ID (S-Label)      |    |    DetNet IP data
+---------------------------------+    |    plane encapsulation
|            UDP Header           |    |
+---------------------------------+    |
|            IP Header            |    |
+---------------------------------+ <--/
|            Data-Link            |
+---------------------------------+
|             Physical            |
+---------------------------------+