An HDMI to Ethernet cable is not a standard cable that exists. HDMI cables are used to transmit audio and video signals between devices like TVs, monitors, and computers. Ethernet cables, on the other hand, are used to connect devices to a network for internet access.
If you need to connect an HDMI device to a network, you would typically use a separate Ethernet cable to connect the device to a router or network switch. There are also HDMI over Ethernet adapters available that allow you to extend HDMI signals over long distances using Ethernet cables, but these are not the same as a single HDMI to Ethernet cable.