PrivateLink
Cboe Global Cloud leverages the AWS PrivateLink which is a highly available, scalable technology that enables you to privately connect your VPC to services as if they were in your VPC. You do not need to use an internet gateway, NAT device, public IP address, AWS Direct Connect connection, or AWS Site-to-Site VPN connection to allow communication with the service from your private subnets.
For additional resources, see here: What is AWS PrivateLink?





