For those of you learning networking, I've written a tutorial called
Identifying the Network and Broadcast Address of a Subnet. In it I provide the basic steps to identify the Network and Broadcast address using an IP/CIDR combination.
Consider it a precursor to learning how to subnet.
I would appreciate any feedback you may have to offer.
By the way, after reading the tutorial feel free to pick up the latest Country IP Blocks access control lists for your networks or websites.