NETGEAR EX6400 - Connect an Ethernet-Enabled Device; Use the Extender in Access Point Mode

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Connect an Ethernet-Enabled Device
After the extender is connected to your existing WiFi network, you can
connect a wired device to the extender using an Ethernet cable. That
device can then access your existing network through the WiFi connection.
Use the Extender in Access Point Mode
You can set up your extender as a WiFi access point. Tri-band WiFi is
available when your extender is in access point mode.
The following instructions assume that you did not previously set up your
extender.