Docker Certified Associate Certification Training Course - Overlay Network

The video tutorial explains the concept of Docker overlay networks, which create distributed networks among multiple Docker hosts. These networks enable secure communication between containers, especially when encryption is enabled. Overlay networks are useful for connecting swarm services and standalone containers across different Docker hosts. The tutorial also covers how to create user-defined overlay networks and discusses configuration concerns. A practical example illustrates the setup of a pets overlay network connecting containers on different hosts.

What is the primary function of the overlay network driver in Docker?

How do overlay networks facilitate communication between containers?

What happens when encryption is enabled in Docker overlay networks?

Describe the difference in behavior when connecting swarm services and standalone containers to an overlay network.

In the provided example, how do the DB and web containers communicate with each other?