Docker Dockerfile and Docker Compose 2020 Ready - Understanding Network Segregation in Docker and the Docker0 network

This video tutorial introduces basic Docker networking concepts, starting with simple commands to list and remove networks. It demonstrates setting up an Apache server in Docker, testing connectivity using curl, and creating custom networks to connect containers. The tutorial concludes with a summary and a preview of using networks in Docker Compose files.

What command is used to list all Docker networks?

• docker network ls

• docker network create

• docker network rm

• docker network inspect

What is the purpose of the 'docker network rm' command?

• To remove unused networks

• To inspect a network

• To list all networks

• To create a new network

What is the default network driver used by Docker?

• Host

• None

• Bridge

• Overlay

Why might you be unable to connect to a Docker container using its DNS name by default?

• The container is not running

• The container is not on the same network

• The container's IP address is incorrect

• The Docker daemon is not running

What command is used to create a new Docker network?

• docker network ls

• docker network rm

• docker network inspect

• docker network create

What happens when you attach containers to a custom Docker network?

• They can communicate with each other by name

• They lose their IP addresses

• They become isolated from all other networks

• They automatically connect to the internet

What is a key benefit of using a custom Docker network?

• Simplified container deployment

• Increased container performance

• Improved security through network isolation

• Automatic internet access for containers