How Does an ECS Use an EIP?

An EIP is a public IP address that can be dynamically bound to the internal IP address of any routed network in a VPC. Before starting an ECS, you can assign a private IP address and a public IP address to the ECS. The public IP address is assigned from the public IP address pool of the VPC and is mapped to the private IP address using Network Address Translation (NAT). After the EIP is released, you can no longer use the public IP address.

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