In this chapter, we have learned about how containers running on a single host can communicate with each other. First, we looked at the CNM that defines the requirements of a container network and then we looked at several implementations of the CNM, such as the bridge network. We then looked at how the bridge network functions in detail and also what kind of information Docker provides us with about the networks and the containers attached to those networks. We also learned about adopting two different perspectives, from both outside and inside the container.
In the next chapter, we're going to introduce Docker Compose. We will learn about creating an application that consists of multiple services, each running in a container, and how Docker Compose allows us to easily build, run, and scale such an application using a declarative approach.