Talk:Web cache

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How does a web browser decide if the version in its internal cache is up to date? - Omegatron 16:30, July 20, 2005 (UTC)

While some content has an explicit expiry-time set, in most cases the browser sends a special If-Modified-Since-Request to the Webserver, which replies either with a status code indicating that the browsers copy is still 'fresh' or with the updated content. --Drangon 22:43, 23 July 2005 (UTC)
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