Description: DNS record expiration indicates when a DNS record is no longer valid and should be removed from the DNS cache. This concept is fundamental to the functioning of the domain name system, as it allows servers and clients to know when they should query the domain information again. Each DNS record has a time-to-live (TTL) that determines how long it can be cached before it is considered stale. When a record reaches its expiration time, it is removed from the cache, forcing systems to perform a new query to the authoritative DNS server to obtain the most up-to-date information. This is crucial for maintaining the integrity and accuracy of information on the network, especially in situations where records may change frequently, such as with dynamic IP addresses or changes in server configurations. Proper management of record expiration helps optimize network performance and reduce load on DNS servers while ensuring that users always receive the most current and relevant information.
