Simple definition
Duration of response DNS Can stay in hiding.
Technical definition
Duration of response DNS In a professional environment, this mechanism usually integrates with other services to control the speed of propagation perceived during a change DNS.
What is it used for?
control the speed of propagation perceived during a change DNS.
Practical example
before migration, the TTL a recording.
Common issues
- missing or incorrect recording
- cache DNS still active
- Incoherent delegation or authoritative server
Key takeaway: Always adapt the diagnosis to the product version and the architecture actually deployed.