What is a configuration that allows bridging two networks over a wireless link?

The setup that enables bridging two networks over a wireless link is when both devices are configured in AP mode and WDS (Wireless Distribution System) mode is enabled. This configuration allows the devices to communicate directly with each other over the wireless connection while also extending the network. It supports the necessary MAC address transparency, which is essential for bridging because packets can easily pass between the two networks as if they were connected by a wired link.

Using WDS mode in this configuration means that both access points can manage and maintain a connection to various clients while ensuring that data packets sent from one network can be relayed to the other network seamlessly. As a result, both networks can utilize the same network resources and maintain a unified internal structure, making it ideal for scenarios where seamless communication between two distant networks is required.

Other configurations listed do not provide the same functional benefits for bridging. While some may allow limited communication, they typically do not support the full bridging functionality necessary to extend and integrate two networks seamlessly.