CompTIA Linux+ XK0-006 (V8) Practice Question

The correct answer is the overlay network. Overlay networks in Docker are designed specifically for multi-host communication, creating a virtual network that spans across all nodes in a Docker Swarm cluster. This allows containers on different hosts to communicate as if they were on the same machine.

• The bridge network is the default for standalone containers on a single host and does not facilitate communication across different hosts by itself.
• The host network removes network isolation, making the container share the host's networking namespace. This is not designed for creating a private, multi-host network for containers.
• The macvlan network allows a container to appear as a physical device on the host's network by assigning it a unique MAC address. While it can enable multi-host communication, it's more complex and typically used for legacy applications or those that need to be on the physical LAN directly, not for creating a virtual network for swarm services.