D-Link DAP-1120 User Manual page 24

Section 3 - Web-based Configuration
If there is no connection between the DAP-1120 and the uplink
router, you can click on the uplink router icon to search for an
available uplink router.
You can view the details of both the uplink router network and
the extended Wi-Fi network by clicking on the DAP-1120 icon.
D-Link DAP-1120 User Manual 21