In a home network to which a client device and a plurality of server devices are connected, using a web browser in a client device and determining whether the plurality of devices are devices which support protocols required by the client device, respectively. The system includes an interrogator 11 and a plurality of RF transponders 12. The above cutting tools include, in particular, a twist drill and a throw away tip. The receptacle is defined by discontinuous wall structure forming a gap opening toward the top or bottom surface of the module.