What is the default networking driver Docker uses for containers?

Docker uses the bridge driver as the default networking driver for containers because it provides a private internal network on which containers can communicate with each other while keeping them isolated from the host network and other external networks. This means that when a container is created without specifying a networking driver, it automatically connects to a bridge network, enabling its own network namespace.

The bridge driver facilitates inter-container communication over a separate, virtualized network, while also allowing communication to the host through port mapping. This approach balances security and ease of use, making it suitable for most typical use cases.

In contrast, other networking drivers such as the overlay driver, which allows communication between containers across different Docker hosts, or the host driver, which shares the host’s network stack, are not the default and serve specific use cases that might require more complex network setups. The option stating that Docker does not use networking is also incorrect because all containers are inherently connected to some network when they are run.