After tracing the evolution of Transmission Control Protocol/Internet Protocol (TCP/IP) from its academic and government research heritage to its current commercial use, we survey new directions in TCP/IP. We explore the issues that derive from growth in scale and function, which are prompting the Internet community to assess significant changes in the protocol suite. We relate these issues to the IBM Open Blueprint™. Much as the IBM Personal Computer brought computing to millions of people, the Internet service of the IBM Global Network and IBM's Internet Connection products are bringing networking to millions of people and are changing how customers are transacting business among themselves and with IBM.
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