Which service is used for resources with public IP addresses needing access from the internet?

The Internet Gateway is designed specifically for allowing resources with public IP addresses to connect to the internet. It serves as a crucial component within Virtual Cloud Networks (VCNs) in Oracle Cloud Infrastructure (OCI), providing a route for traffic going to and from the internet. When you associate an Internet Gateway with a public subnet, it enables the instances within that subnet, which have public IPs, to be accessible from the internet.

This setup is essential for applications or services that need to be accessible to external users or systems, such as web servers, where public traffic is expected. The Internet Gateway supports bidirectional communication, meaning that resources behind it can send requests to the internet and receive responses, facilitating seamless internet connectivity.

In contrast, other options such as NAT Gateway are focused on providing internet access to resources that do not have public IP addresses, functioning primarily to allow private subnets to initiate outbound connections while keeping them hidden from the internet. Peering Gateway pertains to connecting VCNs within the OCI cloud environment rather than providing internet access, and Load Balancers distribute incoming traffic among instances but operate in conjunction with other components, not directly serving as a point of internet access for public IPs.