ConceptIPv4 uses classful addressing scheme or Classless addressing schema.In both addressing scheme, an IPv4 address consists of Network part and Host partIPV4 size consists of 32 bits<---------------32 bit------------>NIDHID NID + HID = 32 bits, Here NID means Network id and HID means Host idClassful addressing schemeClassLeading bits (Reserved)Network ID (bits)Number of NetworksHost ID (bits)Start AddressEnd AddressClass A0827240.0.0.0127.255.255.255Class B101621416128.0.0.0191.255.255.255Class C110242218192.0.0.0223.255.255.255Class D1110Not DefinedNot DefinedNot Defined224.0.0.0239.255.255.255Class E1111Not DefinedNot DefinedNot Defined240.0.0.0255.255.255.255