They drew on the experience from the ARPANET research community and the International Networking Working Group, which Cerf chaired. In the spring of 1973, Vinton Cerf, who helped develop the existing ARPANET Network Control Protocol (NCP) protocol, joined Kahn to work on open-architecture interconnection models with the goal of designing the next protocol generation for the ARPANET.

Kahn joined the DARPA Information Processing Technology Office, where he worked on both satellite packet networks and ground-based radio packet networks, and recognized the value of being able to communicate across both.

After initiating the pioneering ARPANET in 1969, DARPA started work on a number of other data transmission technologies. The Internet protocol suite resulted from research and development conducted by the Defense Advanced Research Projects Agency ( DARPA) in the late 1960s.

The Internet protocol suite predates the OSI model, a more comprehensive reference framework for general networking systems.Īn SRI International Packet Radio Van, used for the first three-way internetworked transmission. The technical standards underlying the Internet protocol suite and its constituent protocols are maintained by the Internet Engineering Task Force (IETF). From lowest to highest, the layers are the link layer, containing communication methods for data that remains within a single network segment (link) the internet layer, providing internetworking between independent networks the transport layer, handling host-to-host communication and the application layer, providing process-to-process data exchange for applications. This functionality is organized into four abstraction layers, which classify all related protocols according to each protocol's scope of networking. The Internet protocol suite provides end-to-end data communication specifying how data should be packetized, addressed, transmitted, routed, and received. The current foundational protocols in the suite are the Transmission Control Protocol (TCP) and the Internet Protocol (IP), as well as the User Datagram Protocol (UDP).ĭuring its development, versions of it were known as the Department of Defense ( DoD) model because the development of the networking method was funded by the United States Department of Defense through DARPA. The Internet protocol suite, commonly known as TCP/IP, is the set of communication protocols used in the Internet and similar computer networks.

Computer networks forouzan ppt s