CompTIA Linux+ XK0-006 (V8) Practice Question

The correct answer is Host-only networking. This mode creates a private virtual network that is shared between the guest VMs and the host machine. In this configuration, the VMs can communicate with the host and with each other (if they are on the same host-only network), but they are isolated from any external networks. This setup is ideal for isolated testing and development environments where network access must be restricted.

• NAT networking is incorrect because it allows the VM to initiate outbound connections to the external network through the host's IP address. While it hides the VM from the external network, it does not prevent the VM from accessing it.
• Bridged networking is incorrect because it connects the VM directly to the physical network, making it a peer to the host and other devices on the LAN. This provides full external network access, which violates the security requirement.
• Routed networking is incorrect because its purpose is to route traffic between the VM's network and an external network, which explicitly provides the connectivity that needs to be prevented.