| Value | Meaning |
|---|---|
| STREAMSOCK_STREAM | Sequenced, reliable, two-way communication-based byte streams |
| DGRAMSOCK_DGRAM | Connectionless, unreliable datagrams with a fixed maximum length; data may be lost or arrive out of order |
| RAWSOCK_RAW | Raw protocol access |
| RDMSOCK_RDM | Reliably-delivered message datagrams |
| SEQPACKETSOCK_SEQPACKET | Sequenced, reliable, two-way connection-based datagrams with a fixed maximum length |
Communication semantics