The number of classless addresses in a block must be a power of 2. The first address must be evenly divisible by the number of addresses. References: Book: Data communication & networking Classless addressing Logical Addressing | IPV4 Addressing: Address Space, Notations ...
I see no error. IP and explicit mask is common to both method.Classfullhave class (implicit mask) in advance, whileclasslesshave no class (implicit mask). Almost true. In classful mode the explicit mas may not be used. There are only two parts (network and host) in such case. May be...