Alibaba Cloud Certified Associate (ACA) Practice Test 2026 - Free ACA Practice Questions and Study Guide

Binding a NAT gateway and an Elastic IP (EIP) to the Virtual Private Cloud (VPC) is a valid solution for configuring public network access for Elastic Container Instances (ECI). This method allows instances deployed within the VPC to initiate outbound traffic to the internet while still providing a means to manage inbound traffic through the NAT gateway. The NAT gateway can handle the translation of private IP addresses of the ECI to the public IP, thereby facilitating internet access without needing to expose the instances directly to incoming connections from the public network. This setup enhances security while still allowing necessary external communications.

Using a NAT gateway also enables better traffic management and can help in controlling costs associated with data transfer, as it allows multiple instances to share a single public IP address. This arrangement is particularly beneficial when deploying applications that need to access external resources without exposing them directly to the internet.

In contrast, other options do not provide a suitable means of configuring public network access. Binding a regular IP address directly to the ECI can expose the instance to more security risks. Configuring ECI as a backend for a Server Load Balancer with a public IP might be secure but can introduce additional complexity and cost. Deploying ECI without any external network access settings would restrict any