DNS cachingis a temporary database that stores information about previous DNS queries. A DNS lookup is the process of translating a domain name into an IP address so that it can be accessed by a computer. The role of DNS caching is to speed up DNS queries, reduce requests to remote DNS servers, and improve network performance and security.
However, DNS caching can sometimes cause some problems, such as:
1. The information in the DNS cache is out of date or incorrect, resulting in inaccessibility or access error.
2. The DNS cache is maliciously modified, resulting in DNS hijacking or DNS pollution, affecting network security and privacy.
3. DNS cache occupies too much system resources, affecting the running speed and stability of the computer.
Therefore, sometimes we need to clean up the DNS cache to guarantee the accuracy and validity of the DNS query. There are several ways to clean up your DNS cache:
1. In Windows system, you can use a command-line tool to clean up the DNS cache. Open the Start menu, type "cmd" and press enter, open the command prompt window, then type "ipconfig flushdns" and press enter, you can clear the DNS cache. If successful, a message "DNS resolution cache has been successfully flushed" is displayed.
2. On macOS, you can use the terminal tool to clean up the DNS cache. Open "Finder", select "Applications" - "Utilities" - "Terminal", open the terminal window, and then according to different macOS versions, enter the corresponding command and press enter, you can clear the DNS cache. For example, for macOS 1015. Enter "sudo killall -hup mdnsresponder" and press enter to clear the DNS cache. If successful, no prompt will be displayed.
3. In the Linux systemYou can use a service management tool to clean up the DNS cache. Open the terminal window, and then enter the corresponding command and press enter according to different Linux distributions and DNS cache services to clear the DNS cache. For example, for Ubuntu systems that use the NSCD service, you can clear the DNS cache by typing "sudo service nscd restart" and pressing enter. If successful, no prompt will be displayed.
4. In the browser, you can use your browser settings or plugins to clean up your DNS cache. Open your browser and select the appropriate settings or plug-ins depending on the browser type and version, and you can clear the DNS cache.
The above are several ways to clean up the DNS cache, I hope it will help you, what do you think about this?Leave your awesome review.
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