intermediateGeneral
TTL (Time to Live)
How long (in seconds) DNS resolvers should cache a record before refreshing it.
TTL (Time to Live) is a DNS record setting that specifies how long (in seconds) a DNS resolver should cache a record before requesting a fresh copy. A TTL of 3600 means resolvers cache the record for one hour. Lowering TTL before making DNS changes (to 300 or 60) speeds up propagation. High TTLs reduce DNS query load; low TTLs provide faster update propagation.