wifi network question
I connected my Deco S4, replacing my router, and I set up a new network name and placed a password on it locking my network.. All is good. If I check the internet access (on the bottom of the computer screen) I will see my network, along with everyone else in the neighborhood. The problem is that sometimes I will also see TP-Link_Extender showing up and it is an open network and I can just connect to it without putting in a password. It doesn't show up all the time. I am assuming it is somehow my network (even though I am connected to my named/locked network) but it's unlocked. No other network shows up on the Deco app. What could that possibly be? Why does it only show up sometimes? And finally, if it is somehow an additional network, how do I put a lock code on it (especially since it's not showing up on the app)?