Web Application Terminology
To start, let's introduce a few terms related to Web applications that we will be using throughout our discussion.
As already discussed, a Web application is provided by a server and used by a client, and it spans the network distance between those two points. To use an application, clients are required to establish one or more connections with the server so that the data to be processed can be routed. In conversing with the server, a client makes a request that is typically answered by a server reply.
A transaction at the Web application level is a request-and-reply dialogue that corresponds to a single logical application behavior. That is, the request made by the client leads to the invocation of application logic ...
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