The bridge network

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 type bridge defined on our host, we can list all networks on the host with the following command:

$ docker network ls

This should provide an output similar to the following:

Listing of all Docker networks available by default

In your case, the IDs will be different, but the rest of the output should look the same. We do...