MoCA can potentially help in these instances if coax hookups are available. Often, it involves hooking up a router to a MoCA adapter at one coaxial outlet in the house. Then, a MoCA WiFI extender ...

IP over Coax Converter (Transmitter + Receiver) Supports IEEE802.3, IEEE802.3u and IEEE802.3X standards Port: 1xRJ45 10/100Mbps, 1xBNC Supports IEEE802.3af and IEEE802.3at power supply standards ...