A synchronous semiconductor memory apparatus is capable of activating an input buffer circuit only in a required operating cycle and achieving low current consumption without degrading high speed response properties of an input buffer. The channel equalizing system includes a frequency diverse quadrature amplitude modulation equalizer and a quadrature amplitude modulation equalizer. In an embodiment, an HTTP server may be enabled to determine the ability of a client to handle incomplete versions of files. An occurrence of the event is detected. An increased authentication proposal response may then be received, and the increased authentication proposal response may be processed in order to store, in association with the user and the user request option, an indication of an increased authentication condition and an indication of an increased authentication mechanism.