☁️ Free practice test question from: Container Orchestration (KCNA)

Bridge Network: When containers are on the same bridge network, they can communicate with each other using container names or service discovery mechanisms. This isolates them from the host's network in terms of direct external access, but allows internal communication.

Host Network: When a container uses the host network, it shares the host's network namespace. This means the container has direct access to the host's network interfaces and is directly exposed to the external network. This is the opposite of what we want for Container B.

None Network: The none network isolates the container completely from the network stack. Communication is only possible through loopback, a virtual network interface that allows communication within the same device. This would prevent Container A from communicating with Container B.
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A) Container A: bridge, Container B: host: This is incorrect because Container B would be directly accessible from outside the host, violating the requirement.

B) Container A: host, Container B: bridge: This is also incorrect because Container A would share the host's network namespace and be directly accessible from the outside. While Container B would be isolated, the requirement was for B to be inaccessible from outside.

D) Container A: bridge, Container B: none: This is incorrect because Container A would not be able to communicate with Container B at all.