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In situations requiring public access for Elastic Compute Instances (ECI), directly assigning multiple public IPs is not a feasible solution. This is because public IP addresses in Alibaba Cloud are typically allocated at the resource level, such as with a Virtual Private Cloud (VPC), but associating multiple public IPs directly to a single ECI is restricted.

Public IP addresses can be dynamically assigned from the cloud provider's pool and are associated with resources that manage interfaces like Load Balancers or NAT Gateways. In scenarios where high availability or traffic distribution is required, linking to a public Load Balancer or binding a NAT Gateway is common practice, as these solutions are designed to handle incoming internet traffic and can distribute it across multiple instances efficiently.

Associating an Elastic IP is also a standard method to provide a static public IP that is associated with a specific ECI, allowing for consistent access. Elastic IPs can be reassigned to different instances as needed, offering flexibility in management.

Thus, the limitation with directly assigning multiple public IPs to a single ECI clarifies why that particular solution is not viable in this context.