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How to Flush DNS

问题:

How do I flush the DNS cache? 

回答:


The DNS cache stores the IP addresses of web servers that contain web pages which you have recently viewed. Sometimes these will contain obsolete information or bad results, and need to be cleared in order for you to communicate with web servers correctly. 
Please follow the steps below in order to flush your DNS cache. 

Windows 10
Due to system security permissions, you must run the command prompt as an Administrator user.
1. Ensure that you're on the Windows 10 desktop.
2. Right click on the start menu and choose Command Prompt (Admin) from the menu.
3. Type in the command ipconfig /flushdns

Windows 8 / Windows 8.1
Due to system security permissions, you must run the command prompt as an Administrator user.
1. Make sure you're on the Windows 8 Start Screen.
2. Simply type cmd and the Windows search bar will appear on the right hand side with search results.
3. Right click on Command Prompt and click Run as administrator
4. Type in the command ipconfig /flushdns

Windows Vista / Windows 7
Due to Microsoft's security additions you must run the command prompt with Administrator privileges.
1. Click the start button and navigate to the command prompt (Start > All Programs > Accessories > Command Prompt)
2. Make sure that you right click on the command prompt application and choose "Run as Administrator"
3. Type in the command ipconfig /flushdns
Note: It is also possible to type in "cmd" (without the quotations) into the Windows Vista / Windows 7 start menu search field, and then right click on the cmd.exe result rather than having to navigate through the various sub menus.

Windows XP
1. Open up a command prompt (Start > Run > cmd.exe > OK).
2. Type in the command ipconfig /flushdns

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