Which OCI service facilitates private connections to on-premises networks?

FastConnect is the correct answer because it is specifically designed to create private, high-bandwidth, and low-latency connections between an organization's on-premises data centers and Oracle Cloud Infrastructure (OCI). This service allows users to establish dedicated connectivity, bypassing the internet, which enhances security and performance. FastConnect is essential for workloads that require a consistent connection with predictable performance, such as database replication, backup, or hybrid cloud configurations.

Other options do not provide the same capability. An Internet Gateway allows for internet access for resources in a virtual cloud network but does not establish private connections to on-premises networks. A Public Load Balancer manages traffic coming from the internet to resources in OCI but does not create a private link to external networks. A Service Gateway facilitates private connectivity between OCI services and on-premises environments for specific services but does not provide the dedicated, direct connection like FastConnect. Thus, FastConnect stands out as the service that effectively meets the requirement for private connectivity to on-premises networks.