Hi, thanks for the reply. If the extender should " have the same authentication type with the router" then I think it is faulty. Look at the screenshot, see the two "DaveG" entries: Extender (A2-E9)...

Model : WA850RE Hardware Version : V2 Firmware Version : : 1.0.0 Build 20160527 Rel. 60757 ISP : WA850RE Extended wifi offers TKIP, how do I disable that? [V2 hardware (Admin, pls note the "Add more...