Riser-rated cables are designed for vertical runs between floors in non-plenum areas. They are constructed to prevent the spread of fire from floor to floor and are appropriate for this application. Plenum-rated cables are used in spaces used for air circulation for heating and air conditioning systems and have stricter fire resistance and low smoke production requirements, but those specifications exceed the needs of the vertical runs described in this scenario. Shielded and unshielded pertains to electromagnetic interference protection, not fire rating or code compliance. Power over Ethernet is a technology for delivering power through an Ethernet cable, not a type of cable rating.