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VPC in AWS - Coggle Diagram

- - - - A private IP address is a non-Internet facing IP address on an internal network. Private IP addresses are provided by network devices, such as routers, using network address translation (NAT).
      - Private IP addresses can only be guaranteed unique to an internal network, excepting conflicts.
      - If a directly connected computer does not have a static IP address assigned, even assigning a private IP address manually will not enable communication.
    - - You can assign one or more secondary private IP addresses to a primary or secondary elastic network interface (ENI). This allows you to optimize the usage of VPC-type instances and divert traffic during a failover.
      - Multiple application usage
        If your ECS instance hosts multiple applications, you can assign multiple secondary private IP addresses to the corresponding ENIs. This way, each application uses a separate IP address for services, which optimizes the usage of the ECS instance.
      - Failover
        If an instance fails, you can unbind ENIs from the instance and bind the ENIs to another instance to divert traffic to that instance. This can ensure service continuity.