The model became known as the Department of Defense (DoD) Internet Model and Internet protocol suite, and informally as TCP/IP. IP versions 1 to 3 were experimental versions, designed between 1973 and 1978.
It also defines addressing methods that are used to label the datagram with source and destination information. Historically, IP was the connectionless datagram service in the original Transmission Control Program introduced by Vint Cerf and Bob Kahn in 1974, which was complemented by a connection-oriented service that became the basis for the Transmission Control Protocol (TCP).
Routers communicate with one another via specially designed routing protocols, either interior gateway protocols or exterior gateway protocols, as needed for the topology of the network. ==Version history== In May 1974, the Institute of Electrical and Electronics Engineers (IEEE) published a paper entitled "A Protocol for Packet Network Intercommunication".
The model became known as the Department of Defense (DoD) Internet Model and Internet protocol suite, and informally as TCP/IP. IP versions 1 to 3 were experimental versions, designed between 1973 and 1978.
Notably, on April 1, 1994, the IETF published an April Fools' Day joke about IPv9.
In 2008, a thorough security assessment and proposed mitigation of problems was published.
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