A networked computer with a networking framework that can operate in accordance with a standard protocol or may be configured to perform one or more functions that alter or extend processing according to the standard. The framework includes extensibility points and a mechanism to receive plug-ins that may perform extensibility functions. Network profile information indicates configuration of the extensibility points, including specific extensibility functions to be executed at the extensibility points. This information may be used to configure the extensibility points so that, as the computer operates, the extensibility functions are selectively executed instead of or in addition to standard functions.