How does Docker handle DNS resolution for containers on the same user-defined bridge network?

Question

Docker Fundamentals — Hard

How does Docker handle DNS resolution for containers on the same user-defined bridge network?

Accepted Answer

Docker handles DNS resolution for containers on the same user-defined bridge network by running an embedded DNS server that automatically resolves container names to their IP addresses. This enables service discovery by container name without hardcoding IPs, unlike the default bridge network.