Why do we need a NAT Gateway?
A NAT (Network Address Translation) gateway is a managed cloud service that allows resources in a private subnet to connect to the public internet or external networks while blocking unsolicited inbound connections from the outside.
Your production web server has failed. How can Elastic IP help minimize downtime?
An Elastic IP (EIP) minimizes downtime by allowing you to rapidly remap a static public IPv4 address from a failed server instance to a healthy replacement instance.
Can a single Elastic IP be associated with multiple EC2 instances?
No, a single Elastic IP address cannot be associated with multiple EC2 instances at the same time. An Elastic IP can only be linked to a single instance or a single network interface (ENI) at any given moment.
What is the difference between a Public IP and an Elastic IP?
The main difference is that a standard Public IP is a dynamic, temporary address automatically assigned to a cloud instance and changes when stopped or terminated, whereas an Elastic IP (EIP) is a static, persistent public address allocated directly to your cloud account that stays the same across restarts and can be manually remapped
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