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On page 9, RFC793 describes the place of TCP in the protocol hierarchy as follows:
+------+ +-----+ +-----+ +-----+
|Telnet| | FTP | |Voice| ... | | Application Level
+------+ +-----+ +-----+ +-----+
| | | |
+-----+ +-----+ +-----+
| TCP | | RTP | ... | | Host Level
+-----+ +-----+ +-----+
| | |
+-------------------------------+
| Internet Protocol & ICMP | Gateway Level
+-------------------------------+
|
+---------------------------+
| Local Network Protocol | Network Level
+---------------------------+
Does this reference model have a name?
On a side note: Eight years later, RFC1122 introduced the distinction between Application/Transport/Internet/Link Layer.
– user2964971 – 2017-07-14T14:22:25.553That's the OSI model – Jimmy_A – 2017-07-14T14:54:21.993
Or more specifically it's the protocol hierarchy model. http://www.e-cartouche.ch/content_reg/cartouche/formats/en/html/Internet_TCP_IP.html
– Jimmy_A – 2017-07-14T15:01:21.460