The Complete Practical Docker Guide - How docker-compose Containers Communicate with Each Other

The video tutorial explains Docker networking, focusing on how Docker Compose creates a bridge network with a specific range of IP addresses for containers. It covers port mapping, allowing containers to communicate internally and externally. The tutorial also discusses DNS server usage for service name resolution, ensuring consistent communication between containers. Additionally, it highlights the use of private IP addresses and network address translation (NAT) for internet access, enabling containers to download necessary packages.

What does Docker Compose create to facilitate communication between containers?

• A new bridge network

• A new virtual machine

• A new file system

• A new user account

Which port is exposed by the API container in the Docker Compose configuration?

• 5050

• 3000

• 8081

• 8080

How can containers communicate with each other internally in Docker?

• Using service names

• Using MAC addresses

• Using external IP addresses

• Using hostnames

What is the role of DNS in Docker networking?

• To provide internet access

• To manage network traffic

• To resolve service names to IP addresses

• To assign IP addresses to containers

Why are the IP addresses assigned to Docker containers considered private?

• They are assigned by the host machine

• They are only accessible within the Docker network

• They are routable on the global internet

• They are encrypted for security