For example, if there is a class C IP, its Subnet Mask would be 255.255.255.0 and the Subnet Prefix Lenght would be 24 as there are 24 network bits.

I have some questions about subnets, I don't understand what they do or how they work. My home network uses 255.255.255.0 as the subnet mask, and the network at my school uses 255.255.0.0. Why are ...

I set up a l2tp over ipsec vpn for a mac os x client. I can connect fine and I get an address, but the subnet mask is wrong (and corresponds to the class..).