* NAT stands for Network Address Translation.
* If you want your EC2 instance in a private subnet can access the internet, this can be achieved only when it can communicate to the internet. However, we do not want to make a subnet public as we want to maintain the degree of control. To overcome the problem, we need to create either NAT Gateways or NAT Instances.
* In real time, NAT Gateways are highly used than NAT instances as NAT instances are an individual EC2 instances, and NAT Gateways are highly available across multiple availability zones, and they are not on a single EC2 instance.
