Riser or plenum rated cables are required by code if you go between floors, except in plenum rated conduit. Conduit is usually more expensive though. Non rated

Riser or plenum rated cables are required by code if you go between floors, except in plenum rated conduit. Conduit is usually more expensive though. Non rated cable more easily catches fire and makes a lot of smoke. Plenum rated cable is about twice the price, but ethernet is pretty cheap for a single home.