<-------------------32-------------------->
+-----------------------------------------+
|LI| VN |Mode| Stratum | Poll | Precision |
+-----------------------------------------+
|                Root Delay               |
+-----------------------------------------+
|             Root Dispersion             |
+-----------------------------------------+
|              Reference ID               |
+-----------------------------------------+
|          Reference Timestamp (64)       |
+-----------------------------------------+
|           Origin Timestamp (64)         |
+-----------------------------------------+
|          Receive Timestamp (64)         |
+-----------------------------------------+
|          Transmit Timestamp (64)        |
+-----------------------------------------+
|   Extension Field 1 (variable length)   |
+-----------------------------------------+
|   Extension Field 2 (variable length)   |
+-----------------------------------------+
|              Key Identifier             |
+-----------------------------------------+
|                dgst (128)               |
+-----------------------------------------+
