What is the importance of using plenum-rated cabling in buildings?

A.
They are noncombustible

B.
They help ensure human safety

C.
They increase speed and bandwidth

D.
They are made out of polyvinyl chloride

Explanation:
Network cabling that is placed in these types of areas, called plenum
space, must meet a specific fire rating to ensure that it will not produce and
release harmful chemicals in case of a fire. A buildings ventilation usually takes
place through this plenum space and if toxic chemicals were to get into that area,
they could be easily spread throughout the building in minutes. Nonplenum cables
usually have a polyvinyl chloride (PVC) jacket covering, whereas plenum-rated cables
have jacket covers made of fluoropolymers.