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Docker Networks

5 min read Quiz at the end

Create bridge networks so containers communicate by service name without exposing ports.

Docker Networks

docker network create mynet

# Containers on same network reach each other by service name
docker run -d --name db     --network mynet postgres
docker run -d --name webapp --network mynet myapp
# webapp reaches db at hostname: db

docker network ls
docker network inspect mynet
docker network connect    mynet mycontainer
docker network disconnect mynet mycontainer
docker network rm mynet

# Drivers: bridge (default) | host | overlay (Swarm)

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Topic Quiz · 2 questions

Test your understanding before moving on

1. How do containers on the same custom network communicate?

💡 Docker provides DNS resolution on custom networks so containers reach each other by name.

2. Which network driver provides the default isolated network for containers?

💡 The bridge driver creates an isolated virtual network (default for standalone containers).

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Docker Networks

Docker Networks

Test your understanding before moving on