beginner~4h
Docker Networking: Bridge, Host, Overlay, DNS & Port Mapping
Docker networking is implemented by libnetwork using a pluggable driver model. The four drivers you must know cold for interviews are: bridge (default, single-host container-to-container networking),
Learning objectives
- Explain what problem each Docker network driver (bridge, host, overlay) is specifically designed to solve.
- Explain how Docker's embedded DNS lets containers reach each other by service name instead of IP address.
- Trace exactly how a request reaches a containerized service through Docker's port mapping.
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Docker Networking: Bridge, Host, Overlay, DNS & Port Mapping