if you have connected the Linksys extender to the router network you recently established. For your basic information, the network name and password for the router and extender are the same. The gadget will expand the network with smooth network speed if it is connected successfully. However, you can use the extended network on your device's WiFi manager if you don't have a WiFi router and you need smooth roaming. The names "_Ext" made it easy to identify these WiFi extended networks. However, the password will be identical to that of the primary networks.
If your Linksys re7000 setup is successful, take advantage of the WiFi coverage. Otherwise, have a quick look at one more setup.