Container Networking

Summary

How containers communicate with each other and the outside world — bridge networks (the default), host networking, and port mapping/exposure are the core concepts.

• 1Practice exposing a container's port to the host machine and connecting to it.
• 2Learn how two containers on the same Docker network can reach each other by service name.
• 3Understand the difference between EXPOSE in a Dockerfile and actually publishing a port at runtime.