What advantage does an Elastic IP provide over a standard Public IP?

An Elastic IP provides the significant advantage of remaining unchanged when it is associated with an instance that is stopped and started. This is crucial for maintaining a consistent endpoint for access, which is particularly important for services that require a stable IP address for external clients or for DNS records.

When using standard public IP addresses, the address is dynamically assigned to the instance when it is launched and can change if the instance is stopped and then started again. This can lead to issues for applications that depend on a consistent IP address for communication or data exchange. With an Elastic IP, the IP address remains exactly the same regardless of the state of the instance, enabling seamless connectivity and reducing the need for reconfiguration in the event of instance restarts.

The other choices describe features or behaviors that do not apply to Elastic IPs, such as internal communication limitations, automatic assignments upon instance launch, or latency comparisons with other IP types, which do not accurately reflect the capabilities of an Elastic IP.