Flushing the Domain Name System resolver cache on an Android device removes stored IP addresses and other DNS records for websites and services. This action forces the device to retrieve fresh information from DNS servers, potentially resolving connectivity issues and security vulnerabilities arising from outdated or corrupted cached data. For example, if a website’s IP address changes, a device with outdated cached data might be unable to access the site until the DNS cache is cleared and updated with the new IP address.
This process is crucial for ensuring access to up-to-date web content and can enhance online security. Outdated DNS entries may direct a device to malicious websites impersonating legitimate services, a threat mitigated by regularly updating DNS information. Historically, the practice of managing DNS caches evolved alongside the increasing complexity of the internet and the need for efficient and secure data retrieval.
