Compounds. There are more carbon compounds than there are compounds of all other elements combined. The study of carbon compounds, both natural and synthetic, is called organic chemistry. Plastics, foods, textiles, and many other common substances contain carbon.
backplane is the shared capacity between interfaces on a switch switch fabric is also the shared capacity between interfaces on a switch and can also be the shared capacity between interfaces on multiple switches using some sort of interconnect, typically vendor specific.
a backplane is generally differentiated from a motherboard by the lack of on board processing and storage elements a backplane uses plug in cards for storage and processing backplanes are normally used in preference to cables because of their greater reliability