What is the purpose of a Dynamic Routing Gateway (DRG) in OCI?

A Dynamic Routing Gateway (DRG) in Oracle Cloud Infrastructure (OCI) serves the critical role of facilitating the connection between on-premises networks and Virtual Cloud Networks (VCNs). It is an essential component in hybrid cloud architectures, allowing for seamless communication and data transfer between a company's private infrastructure and resources deployed in the OCI cloud.

The DRG acts as a routing hub that propagates routes between the VCN and an on-premises network through a VPN or Oracle Cloud's FastConnect service. By enabling this connectivity, organizations can create a hybrid model that enhances flexibility and integration, allowing applications and services to communicate effectively across both environments. This capability is particularly important for businesses that rely on both cloud services and their own data centers, as it ensures that resources can be accessed and managed in a unified manner.

In contrast to the other options, creating public IP addresses focuses on network addressing, while increasing the performance of object storage pertains to data management and storage operations. Managing user authentication involves identity and access management, which is not within the purview of a DRG. Thus, the unique function of a DRG in linking networks is what sets it apart as the correct answer.