Dependencies between table compression and clustered index compression

Hi.

I figured out today that the compression could be set on table and also clustered index level. Before I saw this I thought the clustered index is like a representation of the table itself. But it seems that on both objects different compression settings can be applied. So could somebody explain what is the impact of both settings. Actually I found only in MS resources that it could be set separately.

Thanks in advance,

Nils