If one wireless card is set to "Forwarding=no", what is a true statement about communication between two bridged wireless cards?

When one wireless card is set to "Forwarding=no," it effectively means that the traffic coming through that interface will not be passed onto the bridge. In this case, since "Forwarding=no" pertains to one of the wireless cards serving as part of a bridge interface, that particular wireless interface will not allow communication with any other interfaces in the bridge.

The statement regarding the use of Bridge Filters highlights an important concept in MikroTik configuration. Bridge Filters are used to control and manage the traffic between different interfaces on a bridge. Therefore, if the intention is to prevent communication between wlan1 and wlan2, one can effectively utilize Bridge Filters for this purpose.

This highlights the flexibility that MikroTik systems provide in network design. Instead of relying solely on the forwarding state, administrators can implement filters to manage and control which interfaces can communicate with each other across a bridged network. Thus, setting "Forwarding=no" on one interface doesn't inherently prevent communication; alternative configurations, such as Bridge Filters, can be adjusted to create specific traffic controls.