by Matthew G. Naugle
Wiley Computer Publishing, John Wiley & Sons, Inc.
ISBN: 0471196568 Pub Date: 11/01/98
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Illustrated TCP/IP
by Matthew G. Naugle Wiley Computer Publishing, John Wiley & Sons, Inc. ISBN: 0471196568 Pub Date: 11/01/98 |
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There are many header fields in the IP header, each with a defined function to be determined by the receiving station. The IP header is shown here, encapsulated in an Ethernet packet.
The first field is the VERS, or version, field. This defines the current version of IP implemented by the network station. Version 4 is the latest version. The other versions out there are in experimental stages, or the experiments are finished and the protocol did not make it or was used to test version 6. There are three versions of IP that are running today: 4, 5, and 6. Most do not believe that version 5 is out there but it is; it is known as the Streams 2 protocol. The following information was taken from RFC 1700.
| Assigned Internet Version Numbers | ||||
|---|---|---|---|---|
| Decimal | Keyword | Version | References | |
| 0 | Reserved | |||
| 1–3 | Unassigned | |||
| 4 | IP | Internet Protocol | RFC791 | |
| 5 | ST | ST Datagram Mode | ||
| 6 | IPv6 | RFC 1883 | ||
| 7 | TP/IX | TP/IX: The Next Internet | ||
| 8 | PIP | The P Internet Protocol | ||
| 9 | TUBA | TUBA | ||
| 10–14 | Unassigned | |||
| 15 | Reserved |
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