+------+------+------+
              | DCEP | UTF-8|Binary|
              |      | Data | Data |
              +------+------+------+
              |        SCTP        |
+----------------------------------+
| STUN | SRTP |        DTLS        |
+----------------------------------+
|                ICE               |
+----------------------------------+
| UDP1 | UDP2 | UDP3 | ...         |
+----------------------------------+