looking at this question got me confused. I thought that /27 means that the mask is using 27 bits, therefore making it automatically a class C address using the first 24 bits by default and then stealing an additional three bits from the last octet making the mask 255.255.255.224...how can any of the other addresses possibly be valid if they're not class c addresses?
http://www.techexams.net/forums/viewtopic.php?t=13062
Also, I came across a little subnetting practice test where through all kinds of subnetting questions at you, but I can't find it now...not sure if it was on this site or not.
okay...just thought about this some more and I THINK I've got it partially figured out, but any additional info would be helpful. I did see something at one point where you could cross octets with subnetting, so you could have for example a class A or B address with a mask of 255.255.255.224 or 240, etc.
Any more elaboration would be helpful, also verification that I'm correct, i'm just kind of guessing here based on my just having begun studying this stuff with no books yet, so my resources are limited at this point.
