Ethernet WiFi Extenders for Wired and Wireless Setups

Yes, when it supports access-point mode. Connect it to the router or wired network as described by the manufacturer, then configure the wireless network using the model’s setup process.

Yes, if the extender has an Ethernet port and its operating mode allows wired clients. Check port speed and the quality of the extender’s link back to the router.

An Ethernet extender usually refers to equipment that carries a wired network connection over a longer distance, sometimes through powerline or coax. A WiFi range extender relays wireless coverage; a model with Ethernet may also connect wired clients or run in access-point mode.

Not when used as a wireless range extender. It does need a wired connection to the router or network when operating as a wired access point.