Question: Figure 2.8 illustrates the basic architecture for a three-tier database system. This system can be viewed as an IPO system. What is the input for

Figure 2.8 illustrates the basic architecture for a three-tier database system. This system can be viewed as an IPO system. What is the input for this system? What environmental element generates the input? (Hint: the Web browser computer is within the system boundary.) What is the expected output from this system? What environmental element receives the output? Briefly describe the processing that takes place in this system.

Figure 2.8

Database Web server server HTTP request CGI* request Database CGI HTTP response response (HTML)

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