What is the default network driver in Docker?

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The default network driver in Docker is the bridge driver. When you create a new container without specifying a network, it is automatically connected to the bridge network. This default behavior provides a degree of isolation, enabling the containers to communicate with each other through this network while being separate from the host's network and other network namespaces.

The bridge driver creates a virtual switch within Docker, allowing containers on the same bridge network to communicate using their private IP addresses. In this way, it helps in establishing an isolated environment where services can run without interfering with each other, which is particularly beneficial in microservices architectures or development environments.

Understanding the bridge network is crucial for deploying multi-container applications and managing their communication, as it allows for a simplified network configuration while providing the necessary tools to control access and manage traffic between containers.

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