CompTIA Linux+ XK0-006 (V8) Practice Question

Bridged networking connects the VM's virtual NIC to a Linux bridge that is attached to a physical NIC on the host. Because the bridge switches frames at Layer 2, the guest's MAC address is visible on the upstream switch, DHCP broadcast traffic reaches the external DHCP server, and the guest receives an address in the same subnet as the host. Inbound traffic from any host on that subnet is delivered directly to the VM without additional routing or NAT.

NAT mode places the guest behind the host's private virbrN network; the guest can initiate outbound connections, but external hosts cannot reach it unless specific port-forwarding rules are added. Routed mode provides Layer 3 connectivity with separate subnets, so DHCP broadcasts and layer-2 discovery traffic do not cross the boundary. Isolated (host-only) mode confines traffic to the host and other guests and has no path to the physical network. Therefore, bridged networking is the only option that satisfies all of the stated requirements.