+--------------+-------------+ +--------+-----------------//--------+
|              |             | |        |                //         |
|   hash(FQDN) |  nSFF_ID    | | Length | pathID        //          |
|   (16 bits)  |  (8 bits)   | |(4 bits)|              //           |     
+--------------+-------------+ +--------+-------------//------------+
        Path Request                     Path Response