If a client doesn’t honor the time-to-live (TTL) and sends requests to the IP address after it is removed from DNS, the requests fail. … You can configure health checks, which are used to monitor the health of the registered targets so that the load balancer can send requests only to the healthy targets. For more information, see How …
https://docs.aws.amazon.com/elasticloadbalancing/latest/network/introduction.html

