Containers do not deliver anything in an isolated or solo way substantially. They need to be systematically built and provided with a network interface along with a port number. This leads to a standardized exposition of containers to the outside world, facilitating other hosts or containers to find, bind, and leverage their unique capabilities on any network. Thus, network-accessibility is paramount for containers to get noticed and utilized in innumerable ways. This chapter is dedicated to showcasing how containers are being designed and deployed as a service, and how the aspect of container networking comes in handy by precisely and profusely empowering the peculiar world of container services as the days unfold. In the forthcoming chapters, we will deal and dwell at length on the various capabilities of Docker containers in software-intensive IT environments.