How to understand docker networking?

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Understanding Docker networking involves grasping the concepts and components involved in networking containers within the Docker ecosystem. Here are some key aspects to consider:

Docker Networking Models: Docker provides various networking models, such as bridge, host, overlay, and MACVLAN, each with its own characteristics and use cases. Familiarize yourself with these models to understand how containers communicate and connect with external networks.
Docker Networks: Docker allows you to create custom networks to isolate containers and control their connectivity. You can create networks using the docker network create command and specify the desired driver and options. Docker networks enable containers to communicate with each other by using network aliases or container names as hostnames.
Network Drivers: Docker offers different network drivers like bridge, overlay, host, and macvlan. Each driver has specific functionalities and use cases. For example, the bridge driver facilitates communication between containers on the same host, while the overlay driver enables communication across multiple Docker hosts.
Port Mapping: Docker enables you to expose container ports to the host or map them to specific host ports. This allows external applications or services to access container services running within Docker.
DNS Resolution: Docker provides built-in DNS resolution for containers within the same Docker network. Containers can resolve each other's names using their container names as hostnames.

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