AWS Internet Gateway
AWS Internet Gateway is a horizontally scalable, redundant, and highly available VPC component that allows communication between instances in a VPC and the internet. It serves as a gateway that enables outbound and inbound internet traffic for resources within a VPC, while also performing network address translation (NAT) for instances with public IPv4 addresses. It is a managed service that does not require provisioning or maintenance by the user.
Developers should learn and use AWS Internet Gateway when deploying applications in AWS VPCs that require internet access, such as web servers, APIs, or services needing external updates. It is essential for enabling public-facing resources, facilitating software updates, and allowing outbound internet connectivity for instances, making it a foundational component for hybrid or internet-connected cloud architectures.