In this chapter, we learned about the essential components of Docker networking, which have evolved from coupling simple Docker abstractions and powerful network components such as Linux bridges and Open vSwitch.

We learned how Docker containers can be created with various modes. In the default mode, port mapping helps through the use of iptables NAT rules, allowing traffic arriving at the host to reach containers. Later in the chapter, we covered the basic linking of containers. We also talked about the next generation of Docker networking, which is called libnetwork.