This image shows a single Oracle Cloud Infrastructure region. The region includes a single availability domain with three fault domains. The availability domain includes a virtual cloud network (VCN) with a public regional subnet and a private regional subnet, an internet gateway, a NAT gateway, and a dynamic routing gateway for private connections from the customer's data center through IPSec VPN or FastConnect. The VCN provides routing tables for each subnet and each subnet provides its own security list access. The regional subnets are arranged as functional layers

• Bastion/head node layer (regional public subnet 10.0.1.0/24): The head node resides in fault domain 2 and connects to the internet gateway. Also in this layer, a visualization node resides in fault domain 1.

• HPC cluster layer (regional private subnet 10.0.30.0/24): Remote direct memory access (RDMA) compute nodes are distributed across the three fault domains in a high-performance computing (HPC) cluster (100 gbps RoCE v2 isolated network).