CompTIA Network+

Answer: A - Plenum grade cables release a less toxic material from the jacket of the cable if the cable catches fire.

Key Takeaway: Using Plenum grade ensures fewer toxins are released from the cable’s jacket if the cable catches fire. Plenum is more expensive and does not double the data throughput. It also must be coated in flame retardant plastics. In case of any fire accidents, it reduces the possibility of individuals inhaling poisonous fumes when the outer sheath (plastic coating) of the cable is burnt.