CompTIA Linux+ XK0-006 (V8) Practice Question

The correct option is NAT. Network Address Translation (NAT) mode allows virtual machines to access external networks by using the host's IP address. The host acts as a router, translating the private IP addresses of the VMs to its own public IP for outgoing traffic. This configuration prevents external devices from initiating connections directly to the VMs, meeting the security requirement.

• Bridged networking connects the VMs directly to the physical network, making them appear as separate devices on the LAN. This would make them directly accessible from the external network, which violates the stated requirements.
• Host-only/isolated networking creates a network that is completely contained within the host. VMs can communicate with each other and the host, but they cannot access any external networks, including the internet.
• Routed networking connects the virtual network to the physical network but without using NAT. This requires additional static route configuration on the physical network's router to make the VMs reachable, and it does not inherently hide the VMs behind the host's IP in the same way NAT does.