While I was going through the concept of Access Control, I came upon the fact that ACLs use inverse masks. But while going through the explanation given in cisco site about Control lists, I noticed that in all their explanations, they convert the inverse mask to the original mask and then do the needful.
If that is the case, why do we need inverse masks at all? From my understanding, inverse masks would prove to be useful only when they are bit ORed with the IP address. But I doubt this is the case. So what is the real reason for using an inverse mask?
