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PowerBuilder® 9: Internet and Distributed Application Development by John D. Olson, Bill Green

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Protocols, Sockets, and Ports

With objects divided and distributed, the key to making them all work together is communication. There are several key communication protocols that come into play. We'll describe the major protocols that are in use today.

TCP/IP

TCP/IP, or Transmission Control Protocol/Internet Protocol, is the backbone of the protocols. It is this basic protocol suite that provides connectivity between various elements of a typical Internet structure. The way that TCP/IP works is when a request is made on the client machine (for example, a browser), the data is collected and then divided up into data packets. These packets are small enough to be transmitted from one location to another. Each packet contains information about the ...

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