Originally Posted by Ycaza

Oh and, it is still appropriate to use classes A, B, and C. those still are accurate terms, its just that you no longer can only get ip's in those designations. At one time a class C was the smallest you could get, B was the next smallest allocation and A was the largest, had that arrangement stayed we would have run out of IP's in 1994. CIDR (classless interdomain routing) allowed us to break up the classes for assignment, but they still represent the amounts well. C=256 contiguous IP's (10.1.1.0-255), B=65536 contiguous IP's (10.1.0.0-10.1.255.255), A=16777216 contiguous IP's (10.0.0.0-10.255.255.255), or C=256x1, B=256x256, A=256x256x256. Any questions?