???????????Щ????￡?mod_expires?????????????Cache-Control:max-age??????

????Apache 2′s?????ú?1.3????????????????ο?2.2N??mod_expires??mod_headers?????

???????IIS

????????IIS???Щ?????????????????????????????????????IIS 4.0?????????????????NT???????????С?

????????????????????????????????Administration(?????)??????壬?????????????????HTTP Headers?????????????????????????Enable Content Expiration??Custom HTTP headers?? ????????????????????????????Cache-Control???//zxx: ???????????????????????window7?￡?????????????????!

????????ASP???(Active Server Pages)??????????ο??????ASP????????????ISAPI??????????????????ο?MSDN??

????Netscape/iPlanet?????????

????3.6?汾???????????????????????κη??????Expires???????????????3.0?汾??????HTTP 1.1??????????ζ??HTTP 1.1?????(?????????/?????)???????Cache-Control??????????á?

??????????Cache-Control????????????????????Content Management | Cache Control Directives(???????|??????????)????????????????(Resource Picker)???????????????????????????????????????”???”???????????ο?