CompTIA Linux+ XK0-006 (V8) Practice Question

The correct answer is an overlay network. Overlay networks are designed specifically for multi-host communication, creating a virtual network that spans across different hosts. This allows containers on separate hosts to communicate as if they were on the same local network, which is essential for distributed applications like container orchestration clusters (e.g., Docker Swarm).

The bridge network is the default for single-host container communication and does not inherently support communication across hosts. The host network removes network isolation and makes the container use the host's network stack directly, which can lead to port conflicts and is not designed for creating a separate, unified container network. A macvlan network allows a container to appear as a physical device on the host's local network, assigning it a unique MAC address. While this can enable cross-host communication, its primary purpose is to integrate containers into the physical network, not to create a separate, virtual network spanning multiple hosts.