The Docker bridge network is the first implementation of the container network model that we're going to look at in detail. This network implementation is based on the Linux bridge. When the Docker daemon runs for the first time, it creates a Linux bridge and calls it docker0. This is the default behavior and can be changed by changing the configuration. Docker then creates a network with this Linux bridge and calls the network bridge. All the containers that we create on a Docker host and that we do not explicitly bind to another network leads to Docker automatically attaching to this bridge network.
To verify that we indeed have a network called bridge of the bridge type defined on our host, we can list all the networks on the host with the following command:
$ docker network ls
This should provide...