The Network: TCP/IP
Though we may not know the specifics, we all know that the World Wide Web is just a network—a rather extensive and pervasive network, but just a network nevertheless. A Web application runs on a network. The network is the wire through which the application operates, and if it were not present, the Web application, which requires remote users to connect to a Web server, would not run. (A Web application can be run locally on a machine and not use a physical network, but it will nevertheless be using local network loopback mechanisms to mimic the operation of the network on the local machine.)
Networks are composed of a series of nodes or points on the network (see Figure 27-1). Networks provide high-speed data communications ...
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