When configuring a Docker container's network, which option lets you create a dedicated subnet that containers can join, giving them isolation from other containers running on the same host?
Default bridge network
Overlay network
MACVLAN network
User-defined bridge network
A user-defined bridge network is correct because it creates a host-local Layer-2 segment; only containers explicitly attached to that network can communicate, providing isolation from workloads on other networks. The default bridge network connects every new container by default, so unrelated containers can still reach each other. A MACVLAN network places each container directly on the physical LAN with its own MAC address, not on an isolated internal subnet. An overlay network is designed to connect containers across multiple Docker hosts (often in Swarm), rather than isolating containers on a single host.
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