When it comes to Forex VPS Reviews, the invalidity of a resource does not necessarily cause deletion from the cache. A review of the validity of which may lead to an extension of the validity period without changing the content.
This would also be quite problematic, because such information is often changing the content of the target page and a necessary acknowledgment to the server would not be sent. The resource is provided with an expiration date after retrieval. About three days from the time of invalidity.
If last changed three years ago, the resource is probably quite stable; is it just a quarter of an hour old or has it changed twice during the last day, they would shortly check for freshness.
Web server is a server that accepts HTTP requests from clients, usually a web browser, and give them HTTP responses, usually an HTML page, image, file, media stream or other data.
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