RFC 938 (rfc938) - Page 2 of 16
Internet Reliable Transaction Protocol functional and interface specification
Alternative Format: Original Text Document
RFC 938 February 1985 Internet Reliable Transaction Protocol of transaction packets being exchanged between multiple IRTP users on this host and statically paired IRTP users on the same remote host. 1.3 Relationship to Other Protocols The IRTP is designed for use in a potentially lossy internet environment. It requires that IP be under it. The IP protocol number of IRTP is 28. Conversely, IRTP provides a reliable transport protocol for one or more user processes. User processes must have well-known IRTP port numbers, and can communicate only with matching processes with the same port number. (Note that the term port refers to a higher level protocol. IRTP connections exists between two hosts, not between a host/port and another host/port.) These relationships are depicted below. +--------+ +--------+ +-----------+ | port a |....| port x | | TCP users | Application Level +--------+ +--------+ +-----------+ | | | ... | +--------------+ +-----------+ | IRTP | | TCP | Host Level +--------------+ +-----------+ | | +--------------------------------------+ | Internet Protocol and ICMP | Internet Level +--------------------------------------+ | +--------------------------------------+ | Local Network Protocol | Network Level +--------------------------------------+ Figure 1-1. Relationship of IRTP to Other Protocols Miller
