I’m not internet/technologically savvy so bare with me if I’m using bad terminology. Our son is constantly saying his gaming system lags on our WiFi even tho his room is on the same level 30 feet from our modem. He constantly asks to move our cable tv modem/router into his room so he can connect directly to it. We let him once but our TV guide & TiVo stopped working correctly. So my question is this. Is there a way to connect his gaming system directly to the cable outlet in his room without using our main modem/router? Can we buy a 2nd modem or another device for his room with no issues or interference with the main router in our family room?