I noticed my house has Ethernet ports on all of our bedrooms and kitchen/living room. I would love to take advantage of these by using it to connect a lot of our devices instead of using WiFi but not sure how to do that. Currently our modem/router is connected to one of our cable/co-axial. See pictures below. There are a couple of ports colored blue and white so not sure what the difference in them would be and the box in our closet has 3 color cables hanging which I think where theses ports feed to?