Determining type of addresses

FYou

Hello. Following IP 196.120.192.0/21.
how do i find if this is a network address?
if this is a subnetted address?
and if this is a supernet?

could someone list the steps or explain clearly what i need to do?? Thanks!!

SecurityThroughObscurity

A subnet is a network that is contained entirely within another network; a supernet is a network that entirely contains another network.