https://www.cnet.com/forums/discussions/ethernet-networking-cables-1/

Also NO ONE I KNOW BOTHERS TO STOCK RISER CABLE. Why?

"The fire requirements on riser cable are not as strict. Thus, plenum cable can always replace riser cable, but riser cable cannot replace plenum cable in plenum spaces."
from the web.

Again, this will be a link free zone as a spammer worked these questions to shill and spam.