Indicate the number of leading one bits which form the mask to be logical-ANDed with the destination address before being compared to the value in the cInetCidrRouteDest field. Any assignment (implicit or otherwise) of an instance of this object to a value x must be rejected if the bitwise logical-AND of the mask formed from x with the value of the corresponding instance of the cInetCidrRouteDest object is not equal to cInetCidrRouteDest.