Docker Bridge Networks
Bridge networks are a type of networks used by dockerd(8).
Default Network
By default, containers attach to bridge networks. See here to change that.
If a bridge network is not specified, the default network is used. This network is special in that there is no name resolution; the only way to communicate between containers is their ephemeral IP addresses.
Creating Networks
Custom bridge network can be created and destroyed like:
docker network create my-net docker network rm my-net
A container can be created on a network by specifying the --network option.