What should the Dispatcher do to confirm protection for Train 123 across No. 1 track at Fanwood?

To confirm protection for Train 123 across No. 1 track at Fanwood, the Dispatcher should confirm and acknowledge the receiving employee's permission. This action is crucial in the safety protocol of railway operations because it ensures that the Dispatcher has effectively communicated with the field personnel who are in a position to enforce the protection measures on the track.

By confirming receipt of the protection message and obtaining acknowledgment, it guarantees that all parties involved are aware of the operational scenario, thus preventing any potential miscommunication that could lead to unsafe conditions on the track. Having the receiving employee's permission indicates that they are prepared to act on this information and are currently in a position of authority to ensure that train movements can be safely managed.

Other choices, while relevant in different contexts, do not specifically address the critical need for direct communication and confirmation from the personnel on site who will be responsible for the safety related to Train 123.