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Chapter 3: TCP/IP

CHAPTER 3

TCP/IP

In 1969, the U.S. Department of Defense, acting through its Advanced Research Projects Agency (ARPA, now called DARPA) and in partnership with U.S. universities and the corporate research community, created a four-node network called the ARPANET. This baby step toward what is today known as the Internet used the Network Control Protocol (NCP). In 1974, when NCP proved incapable of handing the increasing amount of traffic, the design for a new set, or suite, of networking protocols was presented called Transmission Control Protocol/Internet Protocol (TCP/IP).

Over the next five years, the protocol went through four version updates. In 1979, version 4, which we have used until just recently and are still using in combination with version 6, was presented and adopted. By 1983 it was mandated that all machines that connected to the ARPANET use this protocol. When this mandate was handed down, it set in motion the adoption of TCP/IP as the protocol of the coming Internet and of any LANs that wanted to connect (without using any protocol conversion) to the Internet.


  

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