A). Manually assign public IPs from a pool to each instance: This is cumbersome and time-consuming for frequent launches, especially as your demand scales. Additionally, manual tracking and allocation increase the risk of errors and IP exhaustion.C. Use NAT Gateway with public IP pool association: While NAT Gateways offer cost savings on outbound traffic, they introduce a single point of failure and limit inbound connections to specific ports. They,re not ideal for applications requiring flexibility and direct inbound access.D. Create secondary public IP CIDR blocks in the subnet: This increases the available public IP addresses, but it,s less flexible than auto-assignment. Managing multiple CIDR blocks and ensuring their efficient use can be complex, especially as your needs evolve.Configuring public IP auto-assignment streamlines the process:
When you launch an instance in the subnet with auto-assignment enabled, it automatically receives a public IP from the available pool.
This is highly scalable and simplifies instance management, automatically fulfilling your dynamic requirements.
Most cloud providers offer auto-assignment functionality, usually within the subnet configuration settings.
Remember to balance flexibility with security:
Implement firewalls and security groups to restrict access to instances based on your application,s needs.
Consider auditing and logging public IP assignments to track usage and potential security concerns.