To remove locally cached Domain Name System (DNS) lookup results, run `ipconfig /_____`.

### Why this is right The `/flushdns` option clears the local DNS resolver cache. This can be useful when a computer may be relying on an outdated cached lookup result, though it does not repair a problem in an authoritative DNS server or guarantee that a name will resolve afterward. ### The concept A DNS resolver cache stores recently obtained name-resolution results so the computer can reuse them rather than making a new query each time. Flushing the cache removes those local entries, after which later lookups can obtain fresh results. This operation differs from `/displaydns`, which shows cached entries, and from `nslookup`, which queries DNS records. If a name still fails after flushing, the cause may be elsewhere, such as incorrect DNS configuration, a server problem, or a network issue. ### Terms - **DNS**: Domain Name System. A system for looking up records associated with domain names. - **Resolver cache**: A local store of recent DNS lookup results. - **Name resolution**: The process of finding network records for a human-readable name. - **Authoritative DNS server**: A server that holds official DNS records for a domain. ### Remember `/flushdns` clears cached results; it does not change the DNS records held by a DNS server.