Your DNS cache stores the locations (IP addresses) of pages you have recently viewed. DNS cache help to speeds up the lookups within the same host. But sometimes if the website page change before your DNS cache is updated, you will failed to access the page. For example, you received a web page with HTML 404 error codes. So you need to flush your DNS cache. Once you clear your DNS cache, your computer will query nameservers for the new DNS information you require.
Clear DNS cache on Windows XP, Vista, Win7 (more…)
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