What action will you recommend to the organization?
I agree with the suggestion but will prefer that the organization should use separate subnets with each ENI for different public IPs.
I do not agree as it is required to have only an elastic IP since an instance has more than one ENI and AWS does not assign a public IP to an instance with multiple ENIs.
I do not agree as AWS VPC does not attach a public IP to an ENI; so the user has to use only an elastic IP only.
I agree with the suggestion and it is recommended to use a public IP from AWS since the organization is going to use DNS with Route 53.
Explanations:
While it is true that using separate subnets can help with network isolation, it doesn’t directly address the main concern about AWS assigning public IPs to ENIs. A public IP from AWS can be used for instances, but not when multiple ENIs are attached to an instance, which requires an Elastic IP for each ENI.
AWS can assign public IPs to instances with a single ENI, but if multiple ENIs are used, AWS does not automatically assign public IPs to them. An Elastic IP is needed for each additional ENI.
AWS VPC does allow the assignment of a public IP to an ENI, but only if the ENI is attached to an instance that is not already associated with multiple ENIs. When multiple ENIs are used, each requires an Elastic IP for public access.
The suggestion to use a public IP from AWS is valid for instances with a single ENI. For instances with multiple ENIs, however, Elastic IPs are needed for each ENI. The use of Route 53 and DNS doesn’t change this requirement.
I arrange that the answer is:
I agree with the suggestion and it is recommended to use a public IP from AWS since the organization is going to use DNS with Route 53.