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  Docker Networking: Bridge, Host, Overlay, and Port Mapping 📅 Published: Feb 2026 ⏱️ Estimated Reading Time: 18 minutes 🏷️ Tags: Docker, Container Networking, Bridge Network, Host Network, Overlay Network, Port Mapping Introduction: How Containers Communicate Containers need to communicate. A web container needs to talk to a database container. An application container needs to receive requests from users. Multiple containers on different servers need to work together as a single application. Docker provides several networking options to handle these scenarios. Each network type serves a different purpose. Understanding them is essential for designing containerized applications. This guide covers the three most important Docker network types: bridge, host, and overlay, along with port mapping for external access. Part 1: Docker Networking Basics Network Drivers Docker uses pluggable network drivers. Each driver provides a different type of networking. Driver Purpose Use Case bri...