Which native cloud security service controls access of source and destination IP addresses and ports to or from a subnet?

The correct answer is based on the function of a Network Access Control List (NACL). NACLs serve as a security layer at the subnet level in a cloud environment, allowing you to control inbound and outbound traffic. They provide a stateless filtering mechanism, meaning that they evaluate both the source and destination IP addresses as well as the ports specified in the rules.

NACLs can be customized with rules that define what traffic is allowed or denied, making it essential for controlling access to subnets and enhancing the security posture of your resources. They apply to the entire subnet, effectively managing traffic flow for all resources within the specified subnets.

In contrast, the other options serve different roles: security groups manage access at the instance level rather than the subnet level, internet gateways provide connectivity to the public internet but do not manage IP filtering, and the VM-Series firewall contributes additional security features but is not inherently a subnet-level control mechanism like NACLs. Thus, the nature and operational scope of NACLs make them the correct choice for controlling access based on source and destination IP addresses and ports within a subnet.