[mono442]

You can score subnets instead of individual ips.

[RupertSalt]

Perhaps you mean “prefixes” such as they are assigned by registrars, and announced by routing protocols.

The instructor of my Cisco classes said that the only module that caused students to break down in tears was VLSM.

[db48x]

Weird. Once I made the analogy with street addresses that are divided into blocks then subnet masking was pretty easy to understand.