The client/server architecture
There are several ways of creating servers using Java. We will illustrate a couple of simple approaches and postpone a detailed discussion of these techniques until Chapter 4, Client/Server Development. Both a client and a server will be created.
A server is installed on a machine with an IP address. It is possible for more than one server to be running on a machine at any given time. When the operating system receives a request for a service on a machine, it will also receive a port number. The port number will identify the server to where the request should be forwarded. A server is, thus, identified by its combination of IP address and port number.
Typically, a client will issue a request to a server. The server ...
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