The network cable is fast. We use network cable is not the problem of distance caused by the network speed, and the use of wifi wireless network, it will bring the attenuation of the signal on the distance.
If we need to see ultra-high-definition picture quality or movies in the TV signal, we must pay attention to the requirements for network speed, otherwise it will be stuck; If the router is close to the TV, say less than a meter away, it doesn't hurt to use wifi. However, the other bedrooms of our home should try to pre-bury the network cable, and try to use class 6 or super 5 network cable, and then the router we use should match the bandwidth.