Can I use an Ethernet cable to connect my computer to the AC1200 extender during setup?

Yes, you can connect your computer to one of the five Ethernet LAN ports on the rear panel of the extender using an Ethernet cable. This method is helpful if you have difficulty establishing a WiFi connection during initial setup. After connecting via Ethernet, open a web browser and go to www.mywifiext.net to access the Smart Setup. However, do not use an Ethernet cable to connect the extender to a WiFi router; the extender only works with a WiFi connection to the router.