Solid Cat5e CMR cable is riser-rated and used where a plenum rating is unnecessary; it is sometimes referred to as PVC Vs. Plenum. Cat 5e solid PVC (or riser) is your main "go to" cable for permanent in-wall or ceiling installation.
Plenum rated CAT 5e Ethernet Cable is used for in-wall and ceiling installations ("drops") this is the proper cable for your structured wiring needs where a plenum rating is required. Our Plenum Ethernet Bulk Cable comes in 1000' easy-pull boxes and multiple colors.
Shielded Ethernet Cat5E Cable is used in many environments where extra protection from outside electrical interference is desired. This can be heavy machinery, transformers, generators or other equipment that has a high degree of EMI, Electro-magnetic interference. This is an excellent Ethernet cable for your structured wiring needs; suitable for installation in walls and ceilings where a plenum rated cable isn't needed.