Type,Description/Meaning,Reference 0,DCCP-Request,[RFC4340] 1,DCCP-Response,[RFC4340] 2,DCCP-Data,[RFC4340] 3,DCCP-Ack,[RFC4340] 4,DCCP-DataAck,[RFC4340] 5,DCCP-CloseReq,[RFC4340] 6,DCCP-Close,[RFC4340] 7,DCCP-Reset,[RFC4340] 8,DCCP-Sync,[RFC4340] 9,DCCP-SyncAck,[RFC4340] 10,DCCP-Listen,[RFC5596] 11-13,Unassigned,[RFC4340] 14,Reserved for experimental and testing use,[RFC4340] 15,Unassigned,[RFC4340]