Kind,Length,Meaning,Reference
0,-,End of Options List (EOL),[RFC-ietf-tsvwg-udp-options-45]
1,-,No Operation (NOP),[RFC-ietf-tsvwg-udp-options-45]
2,6,Additional Payload Checksum (APC),[RFC-ietf-tsvwg-udp-options-45]
3,10/12,Fragmentation (FRAG),[RFC-ietf-tsvwg-udp-options-45]
4,4,Maximum Datagram Size (MDS),[RFC-ietf-tsvwg-udp-options-45]
5,5,Maximum Reassembled Datagram Size (MRDS),[RFC-ietf-tsvwg-udp-options-45]
6,6,Request (REQ),[RFC-ietf-tsvwg-udp-options-45]
7,6,Response (RES),[RFC-ietf-tsvwg-udp-options-45]
8,10,Timestamp (TIME),[RFC-ietf-tsvwg-udp-options-45]
9,(varies),RESERVED for Authentication (AUTH),[RFC-ietf-tsvwg-udp-options-45][draft-touch-tsvwg-udp-auth-opt-00]
10-126,(varies),Unassigned,
127,(varies),[RFC3692]-style experiments (EXP),[RFC-ietf-tsvwg-udp-options-45]
128-191,,Reserved,[RFC-ietf-tsvwg-udp-options-45]
192,(varies),Reserved for UNSAFE Compression (UCMP),[RFC-ietf-tsvwg-udp-options-45]
193,(varies),Reserved for UNSAFE Encryption (UENC),[RFC-ietf-tsvwg-udp-options-45]
194-253,,Unassigned - UNSAFE,
254,(varies),[RFC3692]-style UNSAFE experiments (UEXP),[RFC-ietf-tsvwg-udp-options-45]
255,,Reserved - UNSAFE,[RFC-ietf-tsvwg-udp-options-45]