How to Flush a Cache

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The Domain Name System, or DNS, cache is where computers store records of Internet Protocol, or IP addresses and their corresponding host names. When you access a website, your computer accesses the web server of that website, which has an IP address. Your computer stores this record so that the next time you access the website, it can easily find the web server that hosts the website. Sometimes, web servers change their IP address or their server name. This causes a mismatch in your DNS records. Flushing the DNS cache forces your computer to search for the correct IP address and host name of the website.

  • Click the circular "Windows logo" button on the lower left side of the computer screen. For Windows XP and earlier operating systems, click "Start."

  • Click on "All Programs."

  • Click on "Accessories" and click "Command Prompt."

  • Type "ipconfig /flushdns" without the quotation marks in the command prompt. Press "Enter." This flushes the DNS cache.

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