F - UTP CABLE CAT 6 CAT6 F/UTP means the cable consists of 4 unshielded twisted pairs however it contains an outer foil shield. This is a shielded cable. Product Categories U - UTP CABLE CAT 5E U - UTP CABLE CAT 6 U - UTP CABLE CAT 6A S - FTP CABLE CAT 7 F - UTP CABLE CAT 5E F - UTP CABLE CAT 6 F - UTP CABLE CAT 6A