The Network pane doubles for the TCP/IP and AppleTalk control panels, among other things. From here, you input all your network settings. From the Services tab (obscured), you can turn on Apache, the built-in Web server, and configure the root folder of that server.
In the lower left corner, you can see that in order to modify many of the preferences, you must first enter an administrator password (or re-enter, if you're the administrator).
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