DNSTTL

DNSTTL, or DNS Time to Live, is a critical parameter in the Domain Name System (DNS) that specifies the duration for which a DNS resolver should cache a DNS record before querying the authoritative DNS server again. This value is set in seconds and is included in DNS resource records. A lower TTL value means that the DNS resolver will query the authoritative server more frequently, ensuring that changes to DNS records are propagated quickly. Conversely, a higher TTL value reduces the number of queries to the authoritative server, which can improve performance and reduce load on DNS infrastructure. However, it also means that changes to DNS records may take longer to propagate. The optimal TTL value depends on the specific use case and the balance between performance and timeliness of DNS updates. Administrators can adjust the TTL value to suit their needs, but it's important to consider the trade-offs between performance and propagation speed.