I am trying to find out what the term or name is of a network that has a subnet mask of 255.255.255.0, where there are only 254 possible ip addresses in the range (this would be in a small office environment). I thought it was called a class D network, but that is incorrect I think after reading some about it. Likewise, what is the term or name of a network with a subnet mask of 255.255.0.0 for the third and fourth octet would have variable ip addresses? This obviously would be for a larger segmented network.
I thought they were called the following, but I don't think that is the case:
Class A network = 0.0.0.0
Class B network = 255.0.0.0
Class C network = 255.255.0.0
Class D network = 255.255.255.0 (I don't think these are correct terms).
I need to take a basic networking class to understand this better, but if there are basic terms for I could at least sound a little more intelligent when speaking to our network admins.